Finding the Fourth Proportional to 86.58, 119.57 and 59.06

Step by Step Solution

1. Step 1: Write the proportion equation
   86.58 : 119.57 = 59.06 : x
2. Step 2: Convert to fraction form
   86.58/119.57 = 59.06/x
3. Step 3: Cross multiply
   86.58x = 119.57 × 59.06
4. Step 4: Simplify right side
   86.58x = 7,061.80
5. Step 5: Solve for x
   x = 7,061.80/86.58
6. Step 6: Final answer
   x = 81.56