Finding the Fourth Proportional to 562,105.72, 775,718.20 and 307,456.90

Step by Step Solution

1. Step 1: Write the proportion equation
   562,105.72 : 775,718.20 = 307,456.90 : x
2. Step 2: Convert to fraction form
   562,105.72/775,718.20 = 307,456.90/x
3. Step 3: Cross multiply
   562,105.72x = 775,718.20 × 307,456.90
4. Step 4: Simplify right side
   562,105.72x = 238,499,913,045.58
5. Step 5: Solve for x
   x = 238,499,913,045.58/562,105.72
6. Step 6: Final answer
   x = 424,297.25