Finding the Fourth Proportional to 1,222.58, 1,687.28 and 750.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.58 : 1,687.28 = 750.71 : x
2. Step 2: Convert to fraction form
   1,222.58/1,687.28 = 750.71/x
3. Step 3: Cross multiply
   1,222.58x = 1,687.28 × 750.71
4. Step 4: Simplify right side
   1,222.58x = 1,266,645.78
5. Step 5: Solve for x
   x = 1,266,645.78/1,222.58
6. Step 6: Final answer
   x = 1,036.05