Finding the Fourth Proportional to 89,516.96, 123,552.24 and 56,790.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,516.96 : 123,552.24 = 56,790.28 : x
2. Step 2: Convert to fraction form
   89,516.96/123,552.24 = 56,790.28/x
3. Step 3: Cross multiply
   89,516.96x = 123,552.24 × 56,790.28
4. Step 4: Simplify right side
   89,516.96x = 7,016,566,304.23
5. Step 5: Solve for x
   x = 7,016,566,304.23/89,516.96
6. Step 6: Final answer
   x = 78,382.54