Finding the Third Proportional to 20.94 and 43.78

Step by Step Solution

1. Step 1: Write the proportion equation
   20.94 : 43.78 = 43.78 : x
2. Step 2: Convert to fraction form
   20.94/43.78 = 43.78/x
3. Step 3: Cross multiply
   20.94x = 43.78 × 43.78
4. Step 4: Simplify right side
   20.94x = 1,916.80
5. Step 5: Solve for x
   x = 1,916.80/20.94
6. Step 6: Final answer
   x = 91.55