Finding the Third Proportional to 28.11 and 43.61

Step by Step Solution

1. Step 1: Write the proportion equation
   28.11 : 43.61 = 43.61 : x
2. Step 2: Convert to fraction form
   28.11/43.61 = 43.61/x
3. Step 3: Cross multiply
   28.11x = 43.61 × 43.61
4. Step 4: Simplify right side
   28.11x = 1,901.95
5. Step 5: Solve for x
   x = 1,901.95/28.11
6. Step 6: Final answer
   x = 67.67