Finding the Fourth Proportional to 132,436.80, 198,501.60 and 53,499.20

Step by Step Solution

1. Step 1: Write the proportion equation
   132,436.80 : 198,501.60 = 53,499.20 : x
2. Step 2: Convert to fraction form
   132,436.80/198,501.60 = 53,499.20/x
3. Step 3: Cross multiply
   132,436.80x = 198,501.60 × 53,499.20
4. Step 4: Simplify right side
   132,436.80x = 10,619,676,798.72
5. Step 5: Solve for x
   x = 10,619,676,798.72/132,436.80
6. Step 6: Final answer
   x = 80,186.75