Finding the Fourth Proportional to 2,780.04, 3,836.30 and 1,520.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.04 : 3,836.30 = 1,520.85 : x
2. Step 2: Convert to fraction form
   2,780.04/3,836.30 = 1,520.85/x
3. Step 3: Cross multiply
   2,780.04x = 3,836.30 × 1,520.85
4. Step 4: Simplify right side
   2,780.04x = 5,834,426.27
5. Step 5: Solve for x
   x = 5,834,426.27/2,780.04
6. Step 6: Final answer
   x = 2,098.69