Finding the Fourth Proportional to 389,888.56, 584,853.76 and 123,669.28

Step by Step Solution

1. Step 1: Write the proportion equation
   389,888.56 : 584,853.76 = 123,669.28 : x
2. Step 2: Convert to fraction form
   389,888.56/584,853.76 = 123,669.28/x
3. Step 3: Cross multiply
   389,888.56x = 584,853.76 × 123,669.28
4. Step 4: Simplify right side
   389,888.56x = 72,328,443,404.49
5. Step 5: Solve for x
   x = 72,328,443,404.49/389,888.56
6. Step 6: Final answer
   x = 185,510.56