Finding the Fourth Proportional to 660,940.56, 912,105.12 and 359,134.56

Step by Step Solution

1. Step 1: Write the proportion equation
   660,940.56 : 912,105.12 = 359,134.56 : x
2. Step 2: Convert to fraction form
   660,940.56/912,105.12 = 359,134.56/x
3. Step 3: Cross multiply
   660,940.56x = 912,105.12 × 359,134.56
4. Step 4: Simplify right side
   660,940.56x = 327,568,470,944.95
5. Step 5: Solve for x
   x = 327,568,470,944.95/660,940.56
6. Step 6: Final answer
   x = 495,609.58