Finding the Third Proportional to 67.31 and 91.22

Step by Step Solution

1. Step 1: Write the proportion equation
   67.31 : 91.22 = 91.22 : x
2. Step 2: Convert to fraction form
   67.31/91.22 = 91.22/x
3. Step 3: Cross multiply
   67.31x = 91.22 × 91.22
4. Step 4: Simplify right side
   67.31x = 8,320.86
5. Step 5: Solve for x
   x = 8,320.86/67.31
6. Step 6: Final answer
   x = 123.62