Finding the Fourth Proportional to 2,780.31, 3,836.83 and 1,601.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.31 : 3,836.83 = 1,601.61 : x
2. Step 2: Convert to fraction form
   2,780.31/3,836.83 = 1,601.61/x
3. Step 3: Cross multiply
   2,780.31x = 3,836.83 × 1,601.61
4. Step 4: Simplify right side
   2,780.31x = 6,145,105.30
5. Step 5: Solve for x
   x = 6,145,105.30/2,780.31
6. Step 6: Final answer
   x = 2,210.22