Finding the Fourth Proportional to 3,778.67, 5,214.41 and 2,100.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,778.67 : 5,214.41 = 2,100.15 : x
2. Step 2: Convert to fraction form
   3,778.67/5,214.41 = 2,100.15/x
3. Step 3: Cross multiply
   3,778.67x = 5,214.41 × 2,100.15
4. Step 4: Simplify right side
   3,778.67x = 10,951,043.16
5. Step 5: Solve for x
   x = 10,951,043.16/3,778.67
6. Step 6: Final answer
   x = 2,898.12