Finding the Fourth Proportional to 404,580.30, 607,526.55 and 272,048.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,580.30 : 607,526.55 = 272,048.10 : x
2. Step 2: Convert to fraction form
   404,580.30/607,526.55 = 272,048.10/x
3. Step 3: Cross multiply
   404,580.30x = 607,526.55 × 272,048.10
4. Step 4: Simplify right side
   404,580.30x = 165,276,443,627.06
5. Step 5: Solve for x
   x = 165,276,443,627.06/404,580.30
6. Step 6: Final answer
   x = 408,513.33