Finding the Fourth Proportional to 404,940.64, 558,880.17 and 249,982.17

Step by Step Solution

1. Step 1: Write the proportion equation
   404,940.64 : 558,880.17 = 249,982.17 : x
2. Step 2: Convert to fraction form
   404,940.64/558,880.17 = 249,982.17/x
3. Step 3: Cross multiply
   404,940.64x = 558,880.17 × 249,982.17
4. Step 4: Simplify right side
   404,940.64x = 139,710,077,666.57
5. Step 5: Solve for x
   x = 139,710,077,666.57/404,940.64
6. Step 6: Final answer
   x = 345,013.72