Finding the Fourth Proportional to 1,124.56, 1,687.15 and 637.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.56 : 1,687.15 = 637.96 : x
2. Step 2: Convert to fraction form
   1,124.56/1,687.15 = 637.96/x
3. Step 3: Cross multiply
   1,124.56x = 1,687.15 × 637.96
4. Step 4: Simplify right side
   1,124.56x = 1,076,322.59
5. Step 5: Solve for x
   x = 1,076,322.59/1,124.56
6. Step 6: Final answer
   x = 957.11