Finding the Third Proportional to 27.89 and 42.92

Step by Step Solution

1. Step 1: Write the proportion equation
   27.89 : 42.92 = 42.92 : x
2. Step 2: Convert to fraction form
   27.89/42.92 = 42.92/x
3. Step 3: Cross multiply
   27.89x = 42.92 × 42.92
4. Step 4: Simplify right side
   27.89x = 1,842.29
5. Step 5: Solve for x
   x = 1,842.29/27.89
6. Step 6: Final answer
   x = 66.05