Finding the Fourth Proportional to 86.32, 118.74 and 86.10

Step by Step Solution

1. Step 1: Write the proportion equation
   86.32 : 118.74 = 86.10 : x
2. Step 2: Convert to fraction form
   86.32/118.74 = 86.10/x
3. Step 3: Cross multiply
   86.32x = 118.74 × 86.10
4. Step 4: Simplify right side
   86.32x = 10,223.51
5. Step 5: Solve for x
   x = 10,223.51/86.32
6. Step 6: Final answer
   x = 118.44