Finding the Fourth Proportional to 2,780.13, 3,836.69 and 1,660.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.13 : 3,836.69 = 1,660.82 : x
2. Step 2: Convert to fraction form
   2,780.13/3,836.69 = 1,660.82/x
3. Step 3: Cross multiply
   2,780.13x = 3,836.69 × 1,660.82
4. Step 4: Simplify right side
   2,780.13x = 6,372,036.45
5. Step 5: Solve for x
   x = 6,372,036.45/2,780.13
6. Step 6: Final answer
   x = 2,291.99