Finding the Fourth Proportional to 132,165.12, 198,286.56 and 53,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   132,165.12 : 198,286.56 = 53,238.72 : x
2. Step 2: Convert to fraction form
   132,165.12/198,286.56 = 53,238.72/x
3. Step 3: Cross multiply
   132,165.12x = 198,286.56 × 53,238.72
4. Step 4: Simplify right side
   132,165.12x = 10,556,522,647.60
5. Step 5: Solve for x
   x = 10,556,522,647.60/132,165.12
6. Step 6: Final answer
   x = 79,873.74