Finding the Fourth Proportional to 1,242.27, 1,714.33 and 682.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.27 : 1,714.33 = 682.78 : x
2. Step 2: Convert to fraction form
   1,242.27/1,714.33 = 682.78/x
3. Step 3: Cross multiply
   1,242.27x = 1,714.33 × 682.78
4. Step 4: Simplify right side
   1,242.27x = 1,170,498.25
5. Step 5: Solve for x
   x = 1,170,498.25/1,242.27
6. Step 6: Final answer
   x = 942.23