Finding the Fourth Proportional to 86.04, 118.71 and 61.47

Step by Step Solution

1. Step 1: Write the proportion equation
   86.04 : 118.71 = 61.47 : x
2. Step 2: Convert to fraction form
   86.04/118.71 = 61.47/x
3. Step 3: Cross multiply
   86.04x = 118.71 × 61.47
4. Step 4: Simplify right side
   86.04x = 7,297.10
5. Step 5: Solve for x
   x = 7,297.10/86.04
6. Step 6: Final answer
   x = 84.81