Finding the Fourth Proportional to 404,540.30, 607,466.55 and 272,008.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,540.30 : 607,466.55 = 272,008.10 : x
2. Step 2: Convert to fraction form
   404,540.30/607,466.55 = 272,008.10/x
3. Step 3: Cross multiply
   404,540.30x = 607,466.55 × 272,008.10
4. Step 4: Simplify right side
   404,540.30x = 165,235,822,079.06
5. Step 5: Solve for x
   x = 165,235,822,079.06/404,540.30
6. Step 6: Final answer
   x = 408,453.30