Finding the Fourth Proportional to 404,637.30, 607,612.05 and 272,105.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,637.30 : 607,612.05 = 272,105.10 : x
2. Step 2: Convert to fraction form
   404,637.30/607,612.05 = 272,105.10/x
3. Step 3: Cross multiply
   404,637.30x = 607,612.05 × 272,105.10
4. Step 4: Simplify right side
   404,637.30x = 165,334,337,626.46
5. Step 5: Solve for x
   x = 165,334,337,626.46/404,637.30
6. Step 6: Final answer
   x = 408,598.86