Finding the Fourth Proportional to 2,780.24, 3,836.72 and 1,521.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.24 : 3,836.72 = 1,521.29 : x
2. Step 2: Convert to fraction form
   2,780.24/3,836.72 = 1,521.29/x
3. Step 3: Cross multiply
   2,780.24x = 3,836.72 × 1,521.29
4. Step 4: Simplify right side
   2,780.24x = 5,836,777.16
5. Step 5: Solve for x
   x = 5,836,777.16/2,780.24
6. Step 6: Final answer
   x = 2,099.38