Finding the Fourth Proportional to 83.39, 114.83 and 64.94

Step by Step Solution

1. Step 1: Write the proportion equation
   83.39 : 114.83 = 64.94 : x
2. Step 2: Convert to fraction form
   83.39/114.83 = 64.94/x
3. Step 3: Cross multiply
   83.39x = 114.83 × 64.94
4. Step 4: Simplify right side
   83.39x = 7,456.16
5. Step 5: Solve for x
   x = 7,456.16/83.39
6. Step 6: Final answer
   x = 89.42