Finding the Fourth Proportional to 661,002.72, 912,183.84 and 359,196

Step by Step Solution

1. Step 1: Write the proportion equation
   661,002.72 : 912,183.84 = 359,196 : x
2. Step 2: Convert to fraction form
   661,002.72/912,183.84 = 359,196/x
3. Step 3: Cross multiply
   661,002.72x = 912,183.84 × 359,196
4. Step 4: Simplify right side
   661,002.72x = 327,652,786,592.64
5. Step 5: Solve for x
   x = 327,652,786,592.64/661,002.72
6. Step 6: Final answer
   x = 495,690.53