Finding the Fourth Proportional to 1,242.47, 1,714.59 and 682.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.47 : 1,714.59 = 682.96 : x
2. Step 2: Convert to fraction form
   1,242.47/1,714.59 = 682.96/x
3. Step 3: Cross multiply
   1,242.47x = 1,714.59 × 682.96
4. Step 4: Simplify right side
   1,242.47x = 1,170,996.39
5. Step 5: Solve for x
   x = 1,170,996.39/1,242.47
6. Step 6: Final answer
   x = 942.47