Finding the Fourth Proportional to 2,780.01, 3,836.52 and 1,521.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.01 : 3,836.52 = 1,521.09 : x
2. Step 2: Convert to fraction form
   2,780.01/3,836.52 = 1,521.09/x
3. Step 3: Cross multiply
   2,780.01x = 3,836.52 × 1,521.09
4. Step 4: Simplify right side
   2,780.01x = 5,835,692.21
5. Step 5: Solve for x
   x = 5,835,692.21/2,780.01
6. Step 6: Final answer
   x = 2,099.16