Finding the Fourth Proportional to 99,810, 137,738.24 and 54,489.04

Step by Step Solution

1. Step 1: Write the proportion equation
   99,810 : 137,738.24 = 54,489.04 : x
2. Step 2: Convert to fraction form
   99,810/137,738.24 = 54,489.04/x
3. Step 3: Cross multiply
   99,810x = 137,738.24 × 54,489.04
4. Step 4: Simplify right side
   99,810x = 7,505,224,468.89
5. Step 5: Solve for x
   x = 7,505,224,468.89/99,810
6. Step 6: Final answer
   x = 75,195.12