Finding the Fourth Proportional to 404,243.10, 606,279.60 and 204,375.60

Step by Step Solution

1. Step 1: Write the proportion equation
   404,243.10 : 606,279.60 = 204,375.60 : x
2. Step 2: Convert to fraction form
   404,243.10/606,279.60 = 204,375.60/x
3. Step 3: Cross multiply
   404,243.10x = 606,279.60 × 204,375.60
4. Step 4: Simplify right side
   404,243.10x = 123,908,757,017.76
5. Step 5: Solve for x
   x = 123,908,757,017.76/404,243.10
6. Step 6: Final answer
   x = 306,520.40