Finding the Fourth Proportional to 3,778.98, 5,214.94 and 2,100.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,778.98 : 5,214.94 = 2,100.39 : x
2. Step 2: Convert to fraction form
   3,778.98/5,214.94 = 2,100.39/x
3. Step 3: Cross multiply
   3,778.98x = 5,214.94 × 2,100.39
4. Step 4: Simplify right side
   3,778.98x = 10,953,407.83
5. Step 5: Solve for x
   x = 10,953,407.83/3,778.98
6. Step 6: Final answer
   x = 2,898.51