Finding the Fourth Proportional to 99,196.60, 148,576.20 and 88,115.80

Step by Step Solution

1. Step 1: Write the proportion equation
   99,196.60 : 148,576.20 = 88,115.80 : x
2. Step 2: Convert to fraction form
   99,196.60/148,576.20 = 88,115.80/x
3. Step 3: Cross multiply
   99,196.60x = 148,576.20 × 88,115.80
4. Step 4: Simplify right side
   99,196.60x = 13,091,910,723.96
5. Step 5: Solve for x
   x = 13,091,910,723.96/99,196.60
6. Step 6: Final answer
   x = 131,979.43