Finding the Fourth Proportional to 82.55, 113.87 and 61.83

Step by Step Solution

1. Step 1: Write the proportion equation
   82.55 : 113.87 = 61.83 : x
2. Step 2: Convert to fraction form
   82.55/113.87 = 61.83/x
3. Step 3: Cross multiply
   82.55x = 113.87 × 61.83
4. Step 4: Simplify right side
   82.55x = 7,040.27
5. Step 5: Solve for x
   x = 7,040.27/82.55
6. Step 6: Final answer
   x = 85.29