Finding the Fourth Proportional to 74,584.72, 102,885.42 and 56,651.32

Step by Step Solution

1. Step 1: Write the proportion equation
   74,584.72 : 102,885.42 = 56,651.32 : x
2. Step 2: Convert to fraction form
   74,584.72/102,885.42 = 56,651.32/x
3. Step 3: Cross multiply
   74,584.72x = 102,885.42 × 56,651.32
4. Step 4: Simplify right side
   74,584.72x = 5,828,594,851.75
5. Step 5: Solve for x
   x = 5,828,594,851.75/74,584.72
6. Step 6: Final answer
   x = 78,147.30