Finding the Fourth Proportional to 99,555.10, 137,385.98 and 54,843.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,555.10 : 137,385.98 = 54,843.10 : x
2. Step 2: Convert to fraction form
   99,555.10/137,385.98 = 54,843.10/x
3. Step 3: Cross multiply
   99,555.10x = 137,385.98 × 54,843.10
4. Step 4: Simplify right side
   99,555.10x = 7,534,672,765.52
5. Step 5: Solve for x
   x = 7,534,672,765.52/99,555.10
6. Step 6: Final answer
   x = 75,683.44