Finding the Fourth Proportional to 82.72, 124.03 and 28.59

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 124.03 = 28.59 : x
2. Step 2: Convert to fraction form
   82.72/124.03 = 28.59/x
3. Step 3: Cross multiply
   82.72x = 124.03 × 28.59
4. Step 4: Simplify right side
   82.72x = 3,546.02
5. Step 5: Solve for x
   x = 3,546.02/82.72
6. Step 6: Final answer
   x = 42.87