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Finding the Fourth Proportional to 56,892,978.72, 78,511,712.40 and 30,786,924.96

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Solution

The fourth proportional to 56,892,978.72, 78,511,712.40 and 30,786,924.96 is: 42,485,632.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,892,978.72 : 78,511,712.40 = 30,786,924.96 : x
  2. Step 2: Convert to fraction form
    56,892,978.72/78,511,712.40 = 30,786,924.96/x
  3. Step 3: Cross multiply
    56,892,978.72x = 78,511,712.40 × 30,786,924.96
  4. Step 4: Simplify right side
    56,892,978.72x = 2,417,134,198,139,902
  5. Step 5: Solve for x
    x = 2,417,134,198,139,902/56,892,978.72
  6. Step 6: Final answer
    x = 42,485,632.72

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