Finding the Third Proportional to 28.69 and 45.70

Step by Step Solution

1. Step 1: Write the proportion equation
   28.69 : 45.70 = 45.70 : x
2. Step 2: Convert to fraction form
   28.69/45.70 = 45.70/x
3. Step 3: Cross multiply
   28.69x = 45.70 × 45.70
4. Step 4: Simplify right side
   28.69x = 2,088.78
5. Step 5: Solve for x
   x = 2,088.78/28.69
6. Step 6: Final answer
   x = 72.81