Finding the Fourth Proportional to 2,780.89, 3,837.54 and 1,521.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.89 : 3,837.54 = 1,521.93 : x
2. Step 2: Convert to fraction form
   2,780.89/3,837.54 = 1,521.93/x
3. Step 3: Cross multiply
   2,780.89x = 3,837.54 × 1,521.93
4. Step 4: Simplify right side
   2,780.89x = 5,840,453.95
5. Step 5: Solve for x
   x = 5,840,453.95/2,780.89
6. Step 6: Final answer
   x = 2,100.21