Finding the Fourth Proportional to 1,096.34, 1,512.88 and 624.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.34 : 1,512.88 = 624.31 : x
2. Step 2: Convert to fraction form
   1,096.34/1,512.88 = 624.31/x
3. Step 3: Cross multiply
   1,096.34x = 1,512.88 × 624.31
4. Step 4: Simplify right side
   1,096.34x = 944,500.77
5. Step 5: Solve for x
   x = 944,500.77/1,096.34
6. Step 6: Final answer
   x = 861.51