Finding the Fourth Proportional to 89,693.91, 134,474.98 and 42,979.59

Step by Step Solution

1. Step 1: Write the proportion equation
   89,693.91 : 134,474.98 = 42,979.59 : x
2. Step 2: Convert to fraction form
   89,693.91/134,474.98 = 42,979.59/x
3. Step 3: Cross multiply
   89,693.91x = 134,474.98 × 42,979.59
4. Step 4: Simplify right side
   89,693.91x = 5,779,679,505.66
5. Step 5: Solve for x
   x = 5,779,679,505.66/89,693.91
6. Step 6: Final answer
   x = 64,437.81