Finding the Fourth Proportional to 389,799.38, 584,719.86 and 123,580.73

Step by Step Solution

1. Step 1: Write the proportion equation
   389,799.38 : 584,719.86 = 123,580.73 : x
2. Step 2: Convert to fraction form
   389,799.38/584,719.86 = 123,580.73/x
3. Step 3: Cross multiply
   389,799.38x = 584,719.86 × 123,580.73
4. Step 4: Simplify right side
   389,799.38x = 72,260,107,144.30
5. Step 5: Solve for x
   x = 72,260,107,144.30/389,799.38
6. Step 6: Final answer
   x = 185,377.69