Finding the Fourth Proportional to 99,142.61, 148,533.49 and 88,513.79

Step by Step Solution

1. Step 1: Write the proportion equation
   99,142.61 : 148,533.49 = 88,513.79 : x
2. Step 2: Convert to fraction form
   99,142.61/148,533.49 = 88,513.79/x
3. Step 3: Cross multiply
   99,142.61x = 148,533.49 × 88,513.79
4. Step 4: Simplify right side
   99,142.61x = 13,147,263,220.87
5. Step 5: Solve for x
   x = 13,147,263,220.87/99,142.61
6. Step 6: Final answer
   x = 132,609.61