Finding the Fourth Proportional to 82.91, 124.37 and 28.81

Step by Step Solution

1. Step 1: Write the proportion equation
   82.91 : 124.37 = 28.81 : x
2. Step 2: Convert to fraction form
   82.91/124.37 = 28.81/x
3. Step 3: Cross multiply
   82.91x = 124.37 × 28.81
4. Step 4: Simplify right side
   82.91x = 3,583.10
5. Step 5: Solve for x
   x = 3,583.10/82.91
6. Step 6: Final answer
   x = 43.22