Finding the Fourth Proportional to 52,729.92, 72,765.92 and 28,856.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,729.92 : 72,765.92 = 28,856.72 : x
2. Step 2: Convert to fraction form
   52,729.92/72,765.92 = 28,856.72/x
3. Step 3: Cross multiply
   52,729.92x = 72,765.92 × 28,856.72
4. Step 4: Simplify right side
   52,729.92x = 2,099,785,778.98
5. Step 5: Solve for x
   x = 2,099,785,778.98/52,729.92
6. Step 6: Final answer
   x = 39,821.52