Finding the Fourth Proportional to 82.56, 113.94 and 61.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82.56 : 113.94 = 61.56 : x
2. Step 2: Convert to fraction form
   82.56/113.94 = 61.56/x
3. Step 3: Cross multiply
   82.56x = 113.94 × 61.56
4. Step 4: Simplify right side
   82.56x = 7,014.15
5. Step 5: Solve for x
   x = 7,014.15/82.56
6. Step 6: Final answer
   x = 84.96