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Finding the Fourth Proportional to 212,901.54, 319,352.36 and 86,610.49

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Solution

The fourth proportional to 212,901.54, 319,352.36 and 86,610.49 is: 129,915.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,901.54 : 319,352.36 = 86,610.49 : x
  2. Step 2: Convert to fraction form
    212,901.54/319,352.36 = 86,610.49/x
  3. Step 3: Cross multiply
    212,901.54x = 319,352.36 × 86,610.49
  4. Step 4: Simplify right side
    212,901.54x = 27,659,264,382.26
  5. Step 5: Solve for x
    x = 27,659,264,382.26/212,901.54
  6. Step 6: Final answer
    x = 129,915.76

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