Finding the Third Proportional to 28.16 and 43.56

Step by Step Solution

1. Step 1: Write the proportion equation
   28.16 : 43.56 = 43.56 : x
2. Step 2: Convert to fraction form
   28.16/43.56 = 43.56/x
3. Step 3: Cross multiply
   28.16x = 43.56 × 43.56
4. Step 4: Simplify right side
   28.16x = 1,897.35
5. Step 5: Solve for x
   x = 1,897.35/28.16
6. Step 6: Final answer
   x = 67.38