Finding the Fourth Proportional to 52,819.06, 72,890.51 and 28,620.07

Step by Step Solution

1. Step 1: Write the proportion equation
   52,819.06 : 72,890.51 = 28,620.07 : x
2. Step 2: Convert to fraction form
   52,819.06/72,890.51 = 28,620.07/x
3. Step 3: Cross multiply
   52,819.06x = 72,890.51 × 28,620.07
4. Step 4: Simplify right side
   52,819.06x = 2,086,131,661.20
5. Step 5: Solve for x
   x = 2,086,131,661.20/52,819.06
6. Step 6: Final answer
   x = 39,495.81