Finding the Fourth Proportional to 99,753.89, 137,663.67 and 54,434.35

Step by Step Solution

1. Step 1: Write the proportion equation
   99,753.89 : 137,663.67 = 54,434.35 : x
2. Step 2: Convert to fraction form
   99,753.89/137,663.67 = 54,434.35/x
3. Step 3: Cross multiply
   99,753.89x = 137,663.67 × 54,434.35
4. Step 4: Simplify right side
   99,753.89x = 7,493,632,771.27
5. Step 5: Solve for x
   x = 7,493,632,771.27/99,753.89
6. Step 6: Final answer
   x = 75,121.21