Finding the Fourth Proportional to 1,031.28, 1,423.76 and 653.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.28 : 1,423.76 = 653.69 : x
2. Step 2: Convert to fraction form
   1,031.28/1,423.76 = 653.69/x
3. Step 3: Cross multiply
   1,031.28x = 1,423.76 × 653.69
4. Step 4: Simplify right side
   1,031.28x = 930,687.29
5. Step 5: Solve for x
   x = 930,687.29/1,031.28
6. Step 6: Final answer
   x = 902.46