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Finding the Fourth Proportional to 56,612.16, 78,122.88 and 31,461.12

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Solution

The fourth proportional to 56,612.16, 78,122.88 and 31,461.12 is: 43,415.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,612.16 : 78,122.88 = 31,461.12 : x
  2. Step 2: Convert to fraction form
    56,612.16/78,122.88 = 31,461.12/x
  3. Step 3: Cross multiply
    56,612.16x = 78,122.88 × 31,461.12
  4. Step 4: Simplify right side
    56,612.16x = 2,457,833,302.43
  5. Step 5: Solve for x
    x = 2,457,833,302.43/56,612.16
  6. Step 6: Final answer
    x = 43,415.29

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