Finding the Fourth Proportional to 1,242.34, 1,714.78 and 745.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.34 : 1,714.78 = 745.32 : x
2. Step 2: Convert to fraction form
   1,242.34/1,714.78 = 745.32/x
3. Step 3: Cross multiply
   1,242.34x = 1,714.78 × 745.32
4. Step 4: Simplify right side
   1,242.34x = 1,278,059.83
5. Step 5: Solve for x
   x = 1,278,059.83/1,242.34
6. Step 6: Final answer
   x = 1,028.75