Finding the Fourth Proportional to 1,022.81, 1,411.46 and 624.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,022.81 : 1,411.46 = 624.47 : x
2. Step 2: Convert to fraction form
   1,022.81/1,411.46 = 624.47/x
3. Step 3: Cross multiply
   1,022.81x = 1,411.46 × 624.47
4. Step 4: Simplify right side
   1,022.81x = 881,414.43
5. Step 5: Solve for x
   x = 881,414.43/1,022.81
6. Step 6: Final answer
   x = 861.76