Finding the Fourth Proportional to 123,931.72, 185,745.30 and 57,281.68

Step by Step Solution

1. Step 1: Write the proportion equation
   123,931.72 : 185,745.30 = 57,281.68 : x
2. Step 2: Convert to fraction form
   123,931.72/185,745.30 = 57,281.68/x
3. Step 3: Cross multiply
   123,931.72x = 185,745.30 × 57,281.68
4. Step 4: Simplify right side
   123,931.72x = 10,639,802,836.10
5. Step 5: Solve for x
   x = 10,639,802,836.10/123,931.72
6. Step 6: Final answer
   x = 85,852.14