Finding the Fourth Proportional to 1,096.54, 1,513.18 and 630.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.54 : 1,513.18 = 630.76 : x
2. Step 2: Convert to fraction form
   1,096.54/1,513.18 = 630.76/x
3. Step 3: Cross multiply
   1,096.54x = 1,513.18 × 630.76
4. Step 4: Simplify right side
   1,096.54x = 954,453.42
5. Step 5: Solve for x
   x = 954,453.42/1,096.54
6. Step 6: Final answer
   x = 870.42