Finding the Fourth Proportional to 132,340.56, 198,399.20 and 57,404.30

Step by Step Solution

1. Step 1: Write the proportion equation
   132,340.56 : 198,399.20 = 57,404.30 : x
2. Step 2: Convert to fraction form
   132,340.56/198,399.20 = 57,404.30/x
3. Step 3: Cross multiply
   132,340.56x = 198,399.20 × 57,404.30
4. Step 4: Simplify right side
   132,340.56x = 11,388,967,196.56
5. Step 5: Solve for x
   x = 11,388,967,196.56/132,340.56
6. Step 6: Final answer
   x = 86,058.02