Finding the Fourth Proportional to 52,789.32, 72,849.27 and 28,916.85

Step by Step Solution

1. Step 1: Write the proportion equation
   52,789.32 : 72,849.27 = 28,916.85 : x
2. Step 2: Convert to fraction form
   52,789.32/72,849.27 = 28,916.85/x
3. Step 3: Cross multiply
   52,789.32x = 72,849.27 × 28,916.85
4. Step 4: Simplify right side
   52,789.32x = 2,106,571,413.20
5. Step 5: Solve for x
   x = 2,106,571,413.20/52,789.32
6. Step 6: Final answer
   x = 39,905.26