Finding the Fourth Proportional to 1,096.65, 1,513.25 and 624.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.65 : 1,513.25 = 624.55 : x
2. Step 2: Convert to fraction form
   1,096.65/1,513.25 = 624.55/x
3. Step 3: Cross multiply
   1,096.65x = 1,513.25 × 624.55
4. Step 4: Simplify right side
   1,096.65x = 945,100.57
5. Step 5: Solve for x
   x = 945,100.57/1,096.65
6. Step 6: Final answer
   x = 861.80