Finding the Third Proportional to 28.88 and 43.78

Step by Step Solution

1. Step 1: Write the proportion equation
   28.88 : 43.78 = 43.78 : x
2. Step 2: Convert to fraction form
   28.88/43.78 = 43.78/x
3. Step 3: Cross multiply
   28.88x = 43.78 × 43.78
4. Step 4: Simplify right side
   28.88x = 1,916.80
5. Step 5: Solve for x
   x = 1,916.80/28.88
6. Step 6: Final answer
   x = 66.38