Finding the Fourth Proportional to 123,760.11, 185,610.42 and 57,136.25

Step by Step Solution

1. Step 1: Write the proportion equation
   123,760.11 : 185,610.42 = 57,136.25 : x
2. Step 2: Convert to fraction form
   123,760.11/185,610.42 = 57,136.25/x
3. Step 3: Cross multiply
   123,760.11x = 185,610.42 × 57,136.25
4. Step 4: Simplify right side
   123,760.11x = 10,605,082,431.67
5. Step 5: Solve for x
   x = 10,605,082,431.67/123,760.11
6. Step 6: Final answer
   x = 85,690.64