Finding the Third Proportional to 74.25 and 112.31

Step by Step Solution

1. Step 1: Write the proportion equation
   74.25 : 112.31 = 112.31 : x
2. Step 2: Convert to fraction form
   74.25/112.31 = 112.31/x
3. Step 3: Cross multiply
   74.25x = 112.31 × 112.31
4. Step 4: Simplify right side
   74.25x = 12,614.10
5. Step 5: Solve for x
   x = 12,614.10/74.25
6. Step 6: Final answer
   x = 169.89