Finding the Third Proportional to 61.31 and 90.28

Step by Step Solution

1. Step 1: Write the proportion equation
   61.31 : 90.28 = 90.28 : x
2. Step 2: Convert to fraction form
   61.31/90.28 = 90.28/x
3. Step 3: Cross multiply
   61.31x = 90.28 × 90.28
4. Step 4: Simplify right side
   61.31x = 8,150.70
5. Step 5: Solve for x
   x = 8,150.70/61.31
6. Step 6: Final answer
   x = 132.94