Finding the Fourth Proportional to 1,242.56, 1,715.02 and 745.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.56 : 1,715.02 = 745.52 : x
2. Step 2: Convert to fraction form
   1,242.56/1,715.02 = 745.52/x
3. Step 3: Cross multiply
   1,242.56x = 1,715.02 × 745.52
4. Step 4: Simplify right side
   1,242.56x = 1,278,581.71
5. Step 5: Solve for x
   x = 1,278,581.71/1,242.56
6. Step 6: Final answer
   x = 1,028.99