Finding the Fourth Proportional to 389,723.18, 584,601.78 and 123,503.34

Step by Step Solution

1. Step 1: Write the proportion equation
   389,723.18 : 584,601.78 = 123,503.34 : x
2. Step 2: Convert to fraction form
   389,723.18/584,601.78 = 123,503.34/x
3. Step 3: Cross multiply
   389,723.18x = 584,601.78 × 123,503.34
4. Step 4: Simplify right side
   389,723.18x = 72,200,272,399.95
5. Step 5: Solve for x
   x = 72,200,272,399.95/389,723.18
6. Step 6: Final answer
   x = 185,260.40