Finding the Fourth Proportional to 2,780.50, 3,837.10 and 1,521.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.50 : 3,837.10 = 1,521.58 : x
2. Step 2: Convert to fraction form
   2,780.50/3,837.10 = 1,521.58/x
3. Step 3: Cross multiply
   2,780.50x = 3,837.10 × 1,521.58
4. Step 4: Simplify right side
   2,780.50x = 5,838,454.62
5. Step 5: Solve for x
   x = 5,838,454.62/2,780.50
6. Step 6: Final answer
   x = 2,099.79