Finding the Fourth Proportional to 99,196.10, 148,575.45 and 88,115.30

Step by Step Solution

1. Step 1: Write the proportion equation
   99,196.10 : 148,575.45 = 88,115.30 : x
2. Step 2: Convert to fraction form
   99,196.10/148,575.45 = 88,115.30/x
3. Step 3: Cross multiply
   99,196.10x = 148,575.45 × 88,115.30
4. Step 4: Simplify right side
   99,196.10x = 13,091,770,349.39
5. Step 5: Solve for x
   x = 13,091,770,349.39/99,196.10
6. Step 6: Final answer
   x = 131,978.68