Finding the Fourth Proportional to 1,096.72, 1,513.04 and 630.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.72 : 1,513.04 = 630.88 : x
2. Step 2: Convert to fraction form
   1,096.72/1,513.04 = 630.88/x
3. Step 3: Cross multiply
   1,096.72x = 1,513.04 × 630.88
4. Step 4: Simplify right side
   1,096.72x = 954,546.68
5. Step 5: Solve for x
   x = 954,546.68/1,096.72
6. Step 6: Final answer
   x = 870.36