Finding the Fourth Proportional to 82.89, 124.34 and 28.76

Step by Step Solution

1. Step 1: Write the proportion equation
   82.89 : 124.34 = 28.76 : x
2. Step 2: Convert to fraction form
   82.89/124.34 = 28.76/x
3. Step 3: Cross multiply
   82.89x = 124.34 × 28.76
4. Step 4: Simplify right side
   82.89x = 3,575.25
5. Step 5: Solve for x
   x = 3,575.25/82.89
6. Step 6: Final answer
   x = 43.13