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Finding the Fourth Proportional to 28,705.56, 43,059.15 and 7,929.06

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Solution

The fourth proportional to 28,705.56, 43,059.15 and 7,929.06 is: 11,893.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,705.56 : 43,059.15 = 7,929.06 : x
  2. Step 2: Convert to fraction form
    28,705.56/43,059.15 = 7,929.06/x
  3. Step 3: Cross multiply
    28,705.56x = 43,059.15 × 7,929.06
  4. Step 4: Simplify right side
    28,705.56x = 341,418,583.90
  5. Step 5: Solve for x
    x = 341,418,583.90/28,705.56
  6. Step 6: Final answer
    x = 11,893.81

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