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Finding the Fourth Proportional to 57,479.75, 79,315.16 and 31,979.63

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Solution

The fourth proportional to 57,479.75, 79,315.16 and 31,979.63 is: 44,128.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,479.75 : 79,315.16 = 31,979.63 : x
  2. Step 2: Convert to fraction form
    57,479.75/79,315.16 = 31,979.63/x
  3. Step 3: Cross multiply
    57,479.75x = 79,315.16 × 31,979.63
  4. Step 4: Simplify right side
    57,479.75x = 2,536,469,470.19
  5. Step 5: Solve for x
    x = 2,536,469,470.19/57,479.75
  6. Step 6: Final answer
    x = 44,128.05

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