Finding the Fourth Proportional to 2,780.56, 3,837.02 and 1,521.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.56 : 3,837.02 = 1,521.39 : x
2. Step 2: Convert to fraction form
   2,780.56/3,837.02 = 1,521.39/x
3. Step 3: Cross multiply
   2,780.56x = 3,837.02 × 1,521.39
4. Step 4: Simplify right side
   2,780.56x = 5,837,603.86
5. Step 5: Solve for x
   x = 5,837,603.86/2,780.56
6. Step 6: Final answer
   x = 2,099.43