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Finding the Fourth Proportional to 7,978.14, 11,008.17 and 4,620.76

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Solution

The fourth proportional to 7,978.14, 11,008.17 and 4,620.76 is: 6,375.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.14 : 11,008.17 = 4,620.76 : x
  2. Step 2: Convert to fraction form
    7,978.14/11,008.17 = 4,620.76/x
  3. Step 3: Cross multiply
    7,978.14x = 11,008.17 × 4,620.76
  4. Step 4: Simplify right side
    7,978.14x = 50,866,092.75
  5. Step 5: Solve for x
    x = 50,866,092.75/7,978.14
  6. Step 6: Final answer
    x = 6,375.68

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