Finding the Fourth Proportional to 82.72, 113.82 and 65.98

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 113.82 = 65.98 : x
2. Step 2: Convert to fraction form
   82.72/113.82 = 65.98/x
3. Step 3: Cross multiply
   82.72x = 113.82 × 65.98
4. Step 4: Simplify right side
   82.72x = 7,509.27
5. Step 5: Solve for x
   x = 7,509.27/82.72
6. Step 6: Final answer
   x = 90.78