Finding the Fourth Proportional to 3,786.86, 5,225.94 and 2,108.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.86 : 5,225.94 = 2,108.30 : x
2. Step 2: Convert to fraction form
   3,786.86/5,225.94 = 2,108.30/x
3. Step 3: Cross multiply
   3,786.86x = 5,225.94 × 2,108.30
4. Step 4: Simplify right side
   3,786.86x = 11,017,849.30
5. Step 5: Solve for x
   x = 11,017,849.30/3,786.86
6. Step 6: Final answer
   x = 2,909.49