Finding the Fourth Proportional to 2,780.86, 3,837.61 and 1,521.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.86 : 3,837.61 = 1,521.94 : x
2. Step 2: Convert to fraction form
   2,780.86/3,837.61 = 1,521.94/x
3. Step 3: Cross multiply
   2,780.86x = 3,837.61 × 1,521.94
4. Step 4: Simplify right side
   2,780.86x = 5,840,592.98
5. Step 5: Solve for x
   x = 5,840,592.98/2,780.86
6. Step 6: Final answer
   x = 2,100.28