Finding the Third Proportional to 1,215.42 and 1,323.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.42 : 1,323.42 = 1,323.42 : x
2. Step 2: Convert to fraction form
   1,215.42/1,323.42 = 1,323.42/x
3. Step 3: Cross multiply
   1,215.42x = 1,323.42 × 1,323.42
4. Step 4: Simplify right side
   1,215.42x = 1,751,445.46
5. Step 5: Solve for x
   x = 1,751,445.46/1,215.42
6. Step 6: Final answer
   x = 1,441.02