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Finding the Fourth Proportional to 85,978.38, 128,980.48 and 26,818.68

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Solution

The fourth proportional to 85,978.38, 128,980.48 and 26,818.68 is: 40,232.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,978.38 : 128,980.48 = 26,818.68 : x
  2. Step 2: Convert to fraction form
    85,978.38/128,980.48 = 26,818.68/x
  3. Step 3: Cross multiply
    85,978.38x = 128,980.48 × 26,818.68
  4. Step 4: Simplify right side
    85,978.38x = 3,459,086,219.37
  5. Step 5: Solve for x
    x = 3,459,086,219.37/85,978.38
  6. Step 6: Final answer
    x = 40,232.05

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