Finding the Third Proportional to 56.53 and 90.28

Step by Step Solution

1. Step 1: Write the proportion equation
   56.53 : 90.28 = 90.28 : x
2. Step 2: Convert to fraction form
   56.53/90.28 = 90.28/x
3. Step 3: Cross multiply
   56.53x = 90.28 × 90.28
4. Step 4: Simplify right side
   56.53x = 8,150.70
5. Step 5: Solve for x
   x = 8,150.70/56.53
6. Step 6: Final answer
   x = 144.18