Finding the Third Proportional to 40.10 and 86.47

Step by Step Solution

1. Step 1: Write the proportion equation
   40.10 : 86.47 = 86.47 : x
2. Step 2: Convert to fraction form
   40.10/86.47 = 86.47/x
3. Step 3: Cross multiply
   40.10x = 86.47 × 86.47
4. Step 4: Simplify right side
   40.10x = 7,477.27
5. Step 5: Solve for x
   x = 7,477.27/40.10
6. Step 6: Final answer
   x = 186.44