Finding the Third Proportional to 1,242.42 and 2,687.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.42 : 2,687.34 = 2,687.34 : x
2. Step 2: Convert to fraction form
   1,242.42/2,687.34 = 2,687.34/x
3. Step 3: Cross multiply
   1,242.42x = 2,687.34 × 2,687.34
4. Step 4: Simplify right side
   1,242.42x = 7,221,816.43
5. Step 5: Solve for x
   x = 7,221,816.43/1,242.42
6. Step 6: Final answer
   x = 5,812.69