Finding the Fourth Proportional to 123,781.49, 185,642.37 and 57,157.58

Step by Step Solution

1. Step 1: Write the proportion equation
   123,781.49 : 185,642.37 = 57,157.58 : x
2. Step 2: Convert to fraction form
   123,781.49/185,642.37 = 57,157.58/x
3. Step 3: Cross multiply
   123,781.49x = 185,642.37 × 57,157.58
4. Step 4: Simplify right side
   123,781.49x = 10,610,868,614.66
5. Step 5: Solve for x
   x = 10,610,868,614.66/123,781.49
6. Step 6: Final answer
   x = 85,722.58