Finding the Fourth Proportional to 2,780.53, 3,837.13 and 1,521.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.53 : 3,837.13 = 1,521.58 : x
2. Step 2: Convert to fraction form
   2,780.53/3,837.13 = 1,521.58/x
3. Step 3: Cross multiply
   2,780.53x = 3,837.13 × 1,521.58
4. Step 4: Simplify right side
   2,780.53x = 5,838,516.69
5. Step 5: Solve for x
   x = 5,838,516.69/2,780.53
6. Step 6: Final answer
   x = 2,099.79