Finding the Fourth Proportional to 1,124.62, 1,687.49 and 630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.62 : 1,687.49 = 630.72 : x
2. Step 2: Convert to fraction form
   1,124.62/1,687.49 = 630.72/x
3. Step 3: Cross multiply
   1,124.62x = 1,687.49 × 630.72
4. Step 4: Simplify right side
   1,124.62x = 1,064,333.69
5. Step 5: Solve for x
   x = 1,064,333.69/1,124.62
6. Step 6: Final answer
   x = 946.39