Finding the Fourth Proportional to 99,143.82, 148,584.48 and 72,724.86

Step by Step Solution

1. Step 1: Write the proportion equation
   99,143.82 : 148,584.48 = 72,724.86 : x
2. Step 2: Convert to fraction form
   99,143.82/148,584.48 = 72,724.86/x
3. Step 3: Cross multiply
   99,143.82x = 148,584.48 × 72,724.86
4. Step 4: Simplify right side
   99,143.82x = 10,805,785,506.17
5. Step 5: Solve for x
   x = 10,805,785,506.17/99,143.82
6. Step 6: Final answer
   x = 108,991.01