Finding the Third Proportional to 20.91 and 56.06

Step by Step Solution

1. Step 1: Write the proportion equation
   20.91 : 56.06 = 56.06 : x
2. Step 2: Convert to fraction form
   20.91/56.06 = 56.06/x
3. Step 3: Cross multiply
   20.91x = 56.06 × 56.06
4. Step 4: Simplify right side
   20.91x = 3,143.00
5. Step 5: Solve for x
   x = 3,143.00/20.91
6. Step 6: Final answer
   x = 150.34