Finding the Third Proportional to 111.94 and 172.90

Step by Step Solution

1. Step 1: Write the proportion equation
   111.94 : 172.90 = 172.90 : x
2. Step 2: Convert to fraction form
   111.94/172.90 = 172.90/x
3. Step 3: Cross multiply
   111.94x = 172.90 × 172.90
4. Step 4: Simplify right side
   111.94x = 29,893.87
5. Step 5: Solve for x
   x = 29,893.87/111.94
6. Step 6: Final answer
   x = 267.06