Finding the Third Proportional to 45.56 and 63.91

Step by Step Solution

1. Step 1: Write the proportion equation
   45.56 : 63.91 = 63.91 : x
2. Step 2: Convert to fraction form
   45.56/63.91 = 63.91/x
3. Step 3: Cross multiply
   45.56x = 63.91 × 63.91
4. Step 4: Simplify right side
   45.56x = 4,085.01
5. Step 5: Solve for x
   x = 4,085.01/45.56
6. Step 6: Final answer
   x = 89.66