Finding the Fourth Proportional to 82.86, 124.32 and 28.01

Step by Step Solution

1. Step 1: Write the proportion equation
   82.86 : 124.32 = 28.01 : x
2. Step 2: Convert to fraction form
   82.86/124.32 = 28.01/x
3. Step 3: Cross multiply
   82.86x = 124.32 × 28.01
4. Step 4: Simplify right side
   82.86x = 3,481.58
5. Step 5: Solve for x
   x = 3,481.58/82.86
6. Step 6: Final answer
   x = 42.02