Finding the Fourth Proportional to 389,868.38, 584,875.48 and 123,557.39

Step by Step Solution

1. Step 1: Write the proportion equation
   389,868.38 : 584,875.48 = 123,557.39 : x
2. Step 2: Convert to fraction form
   389,868.38/584,875.48 = 123,557.39/x
3. Step 3: Cross multiply
   389,868.38x = 584,875.48 × 123,557.39
4. Step 4: Simplify right side
   389,868.38x = 72,265,687,783.80
5. Step 5: Solve for x
   x = 72,265,687,783.80/389,868.38
6. Step 6: Final answer
   x = 185,359.19