Finding the Fourth Proportional to 102,445.86, 141,377.03 and 56,510.78

Step by Step Solution

1. Step 1: Write the proportion equation
   102,445.86 : 141,377.03 = 56,510.78 : x
2. Step 2: Convert to fraction form
   102,445.86/141,377.03 = 56,510.78/x
3. Step 3: Cross multiply
   102,445.86x = 141,377.03 × 56,510.78
4. Step 4: Simplify right side
   102,445.86x = 7,989,325,461.86
5. Step 5: Solve for x
   x = 7,989,325,461.86/102,445.86
6. Step 6: Final answer
   x = 77,985.83