Finding the Fourth Proportional to 86.83, 119.81 and 50.00

Step by Step Solution

1. Step 1: Write the proportion equation
   86.83 : 119.81 = 50.00 : x
2. Step 2: Convert to fraction form
   86.83/119.81 = 50.00/x
3. Step 3: Cross multiply
   86.83x = 119.81 × 50.00
4. Step 4: Simplify right side
   86.83x = 5,990.03
5. Step 5: Solve for x
   x = 5,990.03/86.83
6. Step 6: Final answer
   x = 68.99