Finding the Third Proportional to 1,242.38 and 1,812

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.38 : 1,812 = 1,812 : x
2. Step 2: Convert to fraction form
   1,242.38/1,812 = 1,812/x
3. Step 3: Cross multiply
   1,242.38x = 1,812 × 1,812
4. Step 4: Simplify right side
   1,242.38x = 3,283,344
5. Step 5: Solve for x
   x = 3,283,344/1,242.38
6. Step 6: Final answer
   x = 2,642.80