Finding the Fourth Proportional to 3,778.93, 5,215.76 and 2,100.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,778.93 : 5,215.76 = 2,100.92 : x
2. Step 2: Convert to fraction form
   3,778.93/5,215.76 = 2,100.92/x
3. Step 3: Cross multiply
   3,778.93x = 5,215.76 × 2,100.92
4. Step 4: Simplify right side
   3,778.93x = 10,957,894.50
5. Step 5: Solve for x
   x = 10,957,894.50/3,778.93
6. Step 6: Final answer
   x = 2,899.73