Finding the Third Proportional to 28.20 and 45.56

Step by Step Solution

1. Step 1: Write the proportion equation
   28.20 : 45.56 = 45.56 : x
2. Step 2: Convert to fraction form
   28.20/45.56 = 45.56/x
3. Step 3: Cross multiply
   28.20x = 45.56 × 45.56
4. Step 4: Simplify right side
   28.20x = 2,075.49
5. Step 5: Solve for x
   x = 2,075.49/28.20
6. Step 6: Final answer
   x = 73.59