Finding the Fourth Proportional to 1,096.17, 1,512.78 and 624.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.17 : 1,512.78 = 624.09 : x
2. Step 2: Convert to fraction form
   1,096.17/1,512.78 = 624.09/x
3. Step 3: Cross multiply
   1,096.17x = 1,512.78 × 624.09
4. Step 4: Simplify right side
   1,096.17x = 944,105.69
5. Step 5: Solve for x
   x = 944,105.69/1,096.17
6. Step 6: Final answer
   x = 861.28