Finding the Fourth Proportional to 1,096.24, 1,512.78 and 624.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.24 : 1,512.78 = 624.12 : x
2. Step 2: Convert to fraction form
   1,096.24/1,512.78 = 624.12/x
3. Step 3: Cross multiply
   1,096.24x = 1,512.78 × 624.12
4. Step 4: Simplify right side
   1,096.24x = 944,156.25
5. Step 5: Solve for x
   x = 944,156.25/1,096.24
6. Step 6: Final answer
   x = 861.27