Finding the Fourth Proportional to 52,780.06, 72,836.58 and 28,906.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,780.06 : 72,836.58 = 28,906.72 : x
2. Step 2: Convert to fraction form
   52,780.06/72,836.58 = 28,906.72/x
3. Step 3: Cross multiply
   52,780.06x = 72,836.58 × 28,906.72
4. Step 4: Simplify right side
   52,780.06x = 2,105,466,623.82
5. Step 5: Solve for x
   x = 2,105,466,623.82/52,780.06
6. Step 6: Final answer
   x = 39,891.33