Finding the Fourth Proportional to 99,418.88, 137,198.05 and 54,706.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,418.88 : 137,198.05 = 54,706.88 : x
2. Step 2: Convert to fraction form
   99,418.88/137,198.05 = 54,706.88/x
3. Step 3: Cross multiply
   99,418.88x = 137,198.05 × 54,706.88
4. Step 4: Simplify right side
   99,418.88x = 7,505,676,434.83
5. Step 5: Solve for x
   x = 7,505,676,434.83/99,418.88
6. Step 6: Final answer
   x = 75,495.49