Finding the Fourth Proportional to 82.78, 123.58 and 75.94

Step by Step Solution

1. Step 1: Write the proportion equation
   82.78 : 123.58 = 75.94 : x
2. Step 2: Convert to fraction form
   82.78/123.58 = 75.94/x
3. Step 3: Cross multiply
   82.78x = 123.58 × 75.94
4. Step 4: Simplify right side
   82.78x = 9,384.67
5. Step 5: Solve for x
   x = 9,384.67/82.78
6. Step 6: Final answer
   x = 113.37