Finding the Fourth Proportional to 72,683.93, 108,983.88 and 28,258.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,683.93 : 108,983.88 = 28,258.71 : x
2. Step 2: Convert to fraction form
   72,683.93/108,983.88 = 28,258.71/x
3. Step 3: Cross multiply
   72,683.93x = 108,983.88 × 28,258.71
4. Step 4: Simplify right side
   72,683.93x = 3,079,743,450.91
5. Step 5: Solve for x
   x = 3,079,743,450.91/72,683.93
6. Step 6: Final answer
   x = 42,371.72