Finding the Fourth Proportional to 89,474.52, 123,425.54 and 56,709

Step by Step Solution

1. Step 1: Write the proportion equation
   89,474.52 : 123,425.54 = 56,709 : x
2. Step 2: Convert to fraction form
   89,474.52/123,425.54 = 56,709/x
3. Step 3: Cross multiply
   89,474.52x = 123,425.54 × 56,709
4. Step 4: Simplify right side
   89,474.52x = 6,999,338,947.86
5. Step 5: Solve for x
   x = 6,999,338,947.86/89,474.52
6. Step 6: Final answer
   x = 78,227.18