Finding the Fourth Proportional to 52,819.70, 72,890.89 and 28,945.55

Step by Step Solution

1. Step 1: Write the proportion equation
   52,819.70 : 72,890.89 = 28,945.55 : x
2. Step 2: Convert to fraction form
   52,819.70/72,890.89 = 28,945.55/x
3. Step 3: Cross multiply
   52,819.70x = 72,890.89 × 28,945.55
4. Step 4: Simplify right side
   52,819.70x = 2,109,867,010.90
5. Step 5: Solve for x
   x = 2,109,867,010.90/52,819.70
6. Step 6: Final answer
   x = 39,944.70