Finding the Fourth Proportional to 99,510.50, 137,324.49 and 54,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,510.50 : 137,324.49 = 54,798.50 : x
2. Step 2: Convert to fraction form
   99,510.50/137,324.49 = 54,798.50/x
3. Step 3: Cross multiply
   99,510.50x = 137,324.49 × 54,798.50
4. Step 4: Simplify right side
   99,510.50x = 7,525,176,065.27
5. Step 5: Solve for x
   x = 7,525,176,065.27/99,510.50
6. Step 6: Final answer
   x = 75,621.93