Finding the Fourth Proportional to 56,660.50, 78,191.49 and 31,510

Step by Step Solution

1. Step 1: Write the proportion equation
   56,660.50 : 78,191.49 = 31,510 : x
2. Step 2: Convert to fraction form
   56,660.50/78,191.49 = 31,510/x
3. Step 3: Cross multiply
   56,660.50x = 78,191.49 × 31,510
4. Step 4: Simplify right side
   56,660.50x = 2,463,813,849.90
5. Step 5: Solve for x
   x = 2,463,813,849.90/56,660.50
6. Step 6: Final answer
   x = 43,483.80