Finding the Fourth Proportional to 389,824.72, 584,786.29 and 137,045.79

Step by Step Solution

1. Step 1: Write the proportion equation
   389,824.72 : 584,786.29 = 137,045.79 : x
2. Step 2: Convert to fraction form
   389,824.72/584,786.29 = 137,045.79/x
3. Step 3: Cross multiply
   389,824.72x = 584,786.29 × 137,045.79
4. Step 4: Simplify right side
   389,824.72x = 80,142,501,458.48
5. Step 5: Solve for x
   x = 80,142,501,458.48/389,824.72
6. Step 6: Final answer
   x = 205,585.99