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Finding the Fourth Proportional to 71,405.52, 98,539.60 and 39,579.20

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Solution

The fourth proportional to 71,405.52, 98,539.60 and 39,579.20 is: 54,619.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,405.52 : 98,539.60 = 39,579.20 : x
  2. Step 2: Convert to fraction form
    71,405.52/98,539.60 = 39,579.20/x
  3. Step 3: Cross multiply
    71,405.52x = 98,539.60 × 39,579.20
  4. Step 4: Simplify right side
    71,405.52x = 3,900,118,536.32
  5. Step 5: Solve for x
    x = 3,900,118,536.32/71,405.52
  6. Step 6: Final answer
    x = 54,619.29

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