Finding the Fourth Proportional to 102,061.50, 140,849.67 and 56,740.23

Step by Step Solution

1. Step 1: Write the proportion equation
   102,061.50 : 140,849.67 = 56,740.23 : x
2. Step 2: Convert to fraction form
   102,061.50/140,849.67 = 56,740.23/x
3. Step 3: Cross multiply
   102,061.50x = 140,849.67 × 56,740.23
4. Step 4: Simplify right side
   102,061.50x = 7,991,842,671.22
5. Step 5: Solve for x
   x = 7,991,842,671.22/102,061.50
6. Step 6: Final answer
   x = 78,304.19