Finding the Fourth Proportional to 665,300.82, 918,115.47 and 359,377.18

Step by Step Solution

1. Step 1: Write the proportion equation
   665,300.82 : 918,115.47 = 359,377.18 : x
2. Step 2: Convert to fraction form
   665,300.82/918,115.47 = 359,377.18/x
3. Step 3: Cross multiply
   665,300.82x = 918,115.47 × 359,377.18
4. Step 4: Simplify right side
   665,300.82x = 329,949,749,021.38
5. Step 5: Solve for x
   x = 329,949,749,021.38/665,300.82
6. Step 6: Final answer
   x = 495,940.69