Finding the Fourth Proportional to 123,760.23, 185,610.61 and 57,136.37

Step by Step Solution

1. Step 1: Write the proportion equation
   123,760.23 : 185,610.61 = 57,136.37 : x
2. Step 2: Convert to fraction form
   123,760.23/185,610.61 = 57,136.37/x
3. Step 3: Cross multiply
   123,760.23x = 185,610.61 × 57,136.37
4. Step 4: Simplify right side
   123,760.23x = 10,605,116,488.89
5. Step 5: Solve for x
   x = 10,605,116,488.89/123,760.23
6. Step 6: Final answer
   x = 85,690.83