Finding the Fourth Proportional to 81.09, 111.94 and 50.00

Step by Step Solution

1. Step 1: Write the proportion equation
   81.09 : 111.94 = 50.00 : x
2. Step 2: Convert to fraction form
   81.09/111.94 = 50.00/x
3. Step 3: Cross multiply
   81.09x = 111.94 × 50.00
4. Step 4: Simplify right side
   81.09x = 5,596.32
5. Step 5: Solve for x
   x = 5,596.32/81.09
6. Step 6: Final answer
   x = 69.01