Finding the Fourth Proportional to 389,807.68, 584,662.20 and 123,570.76

Step by Step Solution

1. Step 1: Write the proportion equation
   389,807.68 : 584,662.20 = 123,570.76 : x
2. Step 2: Convert to fraction form
   389,807.68/584,662.20 = 123,570.76/x
3. Step 3: Cross multiply
   389,807.68x = 584,662.20 × 123,570.76
4. Step 4: Simplify right side
   389,807.68x = 72,247,152,397.27
5. Step 5: Solve for x
   x = 72,247,152,397.27/389,807.68
6. Step 6: Final answer
   x = 185,340.51