Finding the Fourth Proportional to 82.98, 123.87 and 76.88

Step by Step Solution

1. Step 1: Write the proportion equation
   82.98 : 123.87 = 76.88 : x
2. Step 2: Convert to fraction form
   82.98/123.87 = 76.88/x
3. Step 3: Cross multiply
   82.98x = 123.87 × 76.88
4. Step 4: Simplify right side
   82.98x = 9,522.22
5. Step 5: Solve for x
   x = 9,522.22/82.98
6. Step 6: Final answer
   x = 114.75