Finding the Fourth Proportional to 82.01, 112.54 and 78.82

Step by Step Solution

1. Step 1: Write the proportion equation
   82.01 : 112.54 = 78.82 : x
2. Step 2: Convert to fraction form
   82.01/112.54 = 78.82/x
3. Step 3: Cross multiply
   82.01x = 112.54 × 78.82
4. Step 4: Simplify right side
   82.01x = 8,870.71
5. Step 5: Solve for x
   x = 8,870.71/82.01
6. Step 6: Final answer
   x = 108.16