Finding the Fourth Proportional to 82.89, 124.29 and 28.77

Step by Step Solution

1. Step 1: Write the proportion equation
   82.89 : 124.29 = 28.77 : x
2. Step 2: Convert to fraction form
   82.89/124.29 = 28.77/x
3. Step 3: Cross multiply
   82.89x = 124.29 × 28.77
4. Step 4: Simplify right side
   82.89x = 3,575.82
5. Step 5: Solve for x
   x = 3,575.82/82.89
6. Step 6: Final answer
   x = 43.14