Finding the Fourth Proportional to 404,224.55, 605,755.56 and 278,007.31

Step by Step Solution

1. Step 1: Write the proportion equation
   404,224.55 : 605,755.56 = 278,007.31 : x
2. Step 2: Convert to fraction form
   404,224.55/605,755.56 = 278,007.31/x
3. Step 3: Cross multiply
   404,224.55x = 605,755.56 × 278,007.31
4. Step 4: Simplify right side
   404,224.55x = 168,404,473,753.14
5. Step 5: Solve for x
   x = 168,404,473,753.14/404,224.55
6. Step 6: Final answer
   x = 416,611.20