Finding the Third Proportional to 10.78 and 15.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10.78 : 15.98 = 15.98 : x
2. Step 2: Convert to fraction form
   10.78/15.98 = 15.98/x
3. Step 3: Cross multiply
   10.78x = 15.98 × 15.98
4. Step 4: Simplify right side
   10.78x = 255.50
5. Step 5: Solve for x
   x = 255.50/10.78
6. Step 6: Final answer
   x = 23.70