Finding the Fourth Proportional to 83.89, 126.38 and 65.94

Step by Step Solution

1. Step 1: Write the proportion equation
   83.89 : 126.38 = 65.94 : x
2. Step 2: Convert to fraction form
   83.89/126.38 = 65.94/x
3. Step 3: Cross multiply
   83.89x = 126.38 × 65.94
4. Step 4: Simplify right side
   83.89x = 8,333.50
5. Step 5: Solve for x
   x = 8,333.50/83.89
6. Step 6: Final answer
   x = 99.34