Finding the Fourth Proportional to 389,641.39, 584,458.04 and 123,401.87

Step by Step Solution

1. Step 1: Write the proportion equation
   389,641.39 : 584,458.04 = 123,401.87 : x
2. Step 2: Convert to fraction form
   389,641.39/584,458.04 = 123,401.87/x
3. Step 3: Cross multiply
   389,641.39x = 584,458.04 × 123,401.87
4. Step 4: Simplify right side
   389,641.39x = 72,123,216,919.73
5. Step 5: Solve for x
   x = 72,123,216,919.73/389,641.39
6. Step 6: Final answer
   x = 185,101.53