Finding the Fourth Proportional to 102,070.73, 140,851.15 and 56,747.89

Step by Step Solution

1. Step 1: Write the proportion equation
   102,070.73 : 140,851.15 = 56,747.89 : x
2. Step 2: Convert to fraction form
   102,070.73/140,851.15 = 56,747.89/x
3. Step 3: Cross multiply
   102,070.73x = 140,851.15 × 56,747.89
4. Step 4: Simplify right side
   102,070.73x = 7,993,005,919.97
5. Step 5: Solve for x
   x = 7,993,005,919.97/102,070.73
6. Step 6: Final answer
   x = 78,308.50