Finding the Fourth Proportional to 99,061.11, 136,544.54 and 81,124.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,061.11 : 136,544.54 = 81,124.47 : x
2. Step 2: Convert to fraction form
   99,061.11/136,544.54 = 81,124.47/x
3. Step 3: Cross multiply
   99,061.11x = 136,544.54 × 81,124.47
4. Step 4: Simplify right side
   99,061.11x = 11,077,103,033.27
5. Step 5: Solve for x
   x = 11,077,103,033.27/99,061.11
6. Step 6: Final answer
   x = 111,820.91