Finding the Fourth Proportional to 3,789.76, 5,227.87 and 2,608.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.76 : 5,227.87 = 2,608.78 : x
2. Step 2: Convert to fraction form
   3,789.76/5,227.87 = 2,608.78/x
3. Step 3: Cross multiply
   3,789.76x = 5,227.87 × 2,608.78
4. Step 4: Simplify right side
   3,789.76x = 13,638,362.70
5. Step 5: Solve for x
   x = 13,638,362.70/3,789.76
6. Step 6: Final answer
   x = 3,598.74