Finding the Third Proportional to 27.47 and 42.70

Step by Step Solution

1. Step 1: Write the proportion equation
   27.47 : 42.70 = 42.70 : x
2. Step 2: Convert to fraction form
   27.47/42.70 = 42.70/x
3. Step 3: Cross multiply
   27.47x = 42.70 × 42.70
4. Step 4: Simplify right side
   27.47x = 1,823.56
5. Step 5: Solve for x
   x = 1,823.56/27.47
6. Step 6: Final answer
   x = 66.39