Finding the Fourth Proportional to 404,572.30, 607,514.55 and 272,040.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,572.30 : 607,514.55 = 272,040.10 : x
2. Step 2: Convert to fraction form
   404,572.30/607,514.55 = 272,040.10/x
3. Step 3: Cross multiply
   404,572.30x = 607,514.55 × 272,040.10
4. Step 4: Simplify right side
   404,572.30x = 165,268,318,933.46
5. Step 5: Solve for x
   x = 165,268,318,933.46/404,572.30
6. Step 6: Final answer
   x = 408,501.32