Finding the Fourth Proportional to 86.05, 118.59 and 62.69

Step by Step Solution

1. Step 1: Write the proportion equation
   86.05 : 118.59 = 62.69 : x
2. Step 2: Convert to fraction form
   86.05/118.59 = 62.69/x
3. Step 3: Cross multiply
   86.05x = 118.59 × 62.69
4. Step 4: Simplify right side
   86.05x = 7,434.41
5. Step 5: Solve for x
   x = 7,434.41/86.05
6. Step 6: Final answer
   x = 86.40