Finding the Fourth Proportional to 1,242.31, 1,714.43 and 682.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.31 : 1,714.43 = 682.82 : x
2. Step 2: Convert to fraction form
   1,242.31/1,714.43 = 682.82/x
3. Step 3: Cross multiply
   1,242.31x = 1,714.43 × 682.82
4. Step 4: Simplify right side
   1,242.31x = 1,170,635.11
5. Step 5: Solve for x
   x = 1,170,635.11/1,242.31
6. Step 6: Final answer
   x = 942.31