Finding the Fourth Proportional to 99,545.10, 137,391.03 and 57,131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99,545.10 : 137,391.03 = 57,131.34 : x
2. Step 2: Convert to fraction form
   99,545.10/137,391.03 = 57,131.34/x
3. Step 3: Cross multiply
   99,545.10x = 137,391.03 × 57,131.34
4. Step 4: Simplify right side
   99,545.10x = 7,849,333,647.88
5. Step 5: Solve for x
   x = 7,849,333,647.88/99,545.10
6. Step 6: Final answer
   x = 78,852.03