Finding the Fourth Proportional to 99,436.62, 137,223.12 and 54,114.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,436.62 : 137,223.12 = 54,114.96 : x
2. Step 2: Convert to fraction form
   99,436.62/137,223.12 = 54,114.96/x
3. Step 3: Cross multiply
   99,436.62x = 137,223.12 × 54,114.96
4. Step 4: Simplify right side
   99,436.62x = 7,425,823,649.88
5. Step 5: Solve for x
   x = 7,425,823,649.88/99,436.62
6. Step 6: Final answer
   x = 74,678.96