Finding the Fourth Proportional to 2,780.59, 3,837.18 and 1,521.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.59 : 3,837.18 = 1,521.63 : x
2. Step 2: Convert to fraction form
   2,780.59/3,837.18 = 1,521.63/x
3. Step 3: Cross multiply
   2,780.59x = 3,837.18 × 1,521.63
4. Step 4: Simplify right side
   2,780.59x = 5,838,764.40
5. Step 5: Solve for x
   x = 5,838,764.40/2,780.59
6. Step 6: Final answer
   x = 2,099.83