Finding the Fourth Proportional to 665,300.30, 918,114.78 and 359,376.69

Step by Step Solution

1. Step 1: Write the proportion equation
   665,300.30 : 918,114.78 = 359,376.69 : x
2. Step 2: Convert to fraction form
   665,300.30/918,114.78 = 359,376.69/x
3. Step 3: Cross multiply
   665,300.30x = 918,114.78 × 359,376.69
4. Step 4: Simplify right side
   665,300.30x = 329,949,046,085.90
5. Step 5: Solve for x
   x = 329,949,046,085.90/665,300.30
6. Step 6: Final answer
   x = 495,940.02