Finding the Fourth Proportional to 645,875.46, 891,307.98 and 359,414.10

Step by Step Solution

1. Step 1: Write the proportion equation
   645,875.46 : 891,307.98 = 359,414.10 : x
2. Step 2: Convert to fraction form
   645,875.46/891,307.98 = 359,414.10/x
3. Step 3: Cross multiply
   645,875.46x = 891,307.98 × 359,414.10
4. Step 4: Simplify right side
   645,875.46x = 320,348,655,454.52
5. Step 5: Solve for x
   x = 320,348,655,454.52/645,875.46
6. Step 6: Final answer
   x = 495,991.37