Finding the Fourth Proportional to 1,242.24, 1,714.72 and 718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.24 : 1,714.72 = 718.72 : x
2. Step 2: Convert to fraction form
   1,242.24/1,714.72 = 718.72/x
3. Step 3: Cross multiply
   1,242.24x = 1,714.72 × 718.72
4. Step 4: Simplify right side
   1,242.24x = 1,232,403.56
5. Step 5: Solve for x
   x = 1,232,403.56/1,242.24
6. Step 6: Final answer
   x = 992.08