Finding the Fourth Proportional to 123,729.22, 185,510.49 and 57,132.64

Step by Step Solution

1. Step 1: Write the proportion equation
   123,729.22 : 185,510.49 = 57,132.64 : x
2. Step 2: Convert to fraction form
   123,729.22/185,510.49 = 57,132.64/x
3. Step 3: Cross multiply
   123,729.22x = 185,510.49 × 57,132.64
4. Step 4: Simplify right side
   123,729.22x = 10,598,704,041.39
5. Step 5: Solve for x
   x = 10,598,704,041.39/123,729.22
6. Step 6: Final answer
   x = 85,660.48