Finding the Fourth Proportional to 390,513.38, 585,545.90 and 153,726.89

Step by Step Solution

1. Step 1: Write the proportion equation
   390,513.38 : 585,545.90 = 153,726.89 : x
2. Step 2: Convert to fraction form
   390,513.38/585,545.90 = 153,726.89/x
3. Step 3: Cross multiply
   390,513.38x = 585,545.90 × 153,726.89
4. Step 4: Simplify right side
   390,513.38x = 90,014,146,462.89
5. Step 5: Solve for x
   x = 90,014,146,462.89/390,513.38
6. Step 6: Final answer
   x = 230,502.08