Finding the Third Proportional to 86.16 and 184.78

Step by Step Solution

1. Step 1: Write the proportion equation
   86.16 : 184.78 = 184.78 : x
2. Step 2: Convert to fraction form
   86.16/184.78 = 184.78/x
3. Step 3: Cross multiply
   86.16x = 184.78 × 184.78
4. Step 4: Simplify right side
   86.16x = 34,144.11
5. Step 5: Solve for x
   x = 34,144.11/86.16
6. Step 6: Final answer
   x = 396.30