Finding the Fourth Proportional to 660,974.32, 912,158.04 and 359,187.76

Step by Step Solution

1. Step 1: Write the proportion equation
   660,974.32 : 912,158.04 = 359,187.76 : x
2. Step 2: Convert to fraction form
   660,974.32/912,158.04 = 359,187.76/x
3. Step 3: Cross multiply
   660,974.32x = 912,158.04 × 359,187.76
4. Step 4: Simplify right side
   660,974.32x = 327,636,003,153.59
5. Step 5: Solve for x
   x = 327,636,003,153.59/660,974.32
6. Step 6: Final answer
   x = 495,686.43