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Finding the Fourth Proportional to 71,724.63, 98,978.59 and 39,892.85

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Solution

The fourth proportional to 71,724.63, 98,978.59 and 39,892.85 is: 55,051.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,724.63 : 98,978.59 = 39,892.85 : x
  2. Step 2: Convert to fraction form
    71,724.63/98,978.59 = 39,892.85/x
  3. Step 3: Cross multiply
    71,724.63x = 98,978.59 × 39,892.85
  4. Step 4: Simplify right side
    71,724.63x = 3,948,538,044.08
  5. Step 5: Solve for x
    x = 3,948,538,044.08/71,724.63
  6. Step 6: Final answer
    x = 55,051.35

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