Finding the Fourth Proportional to 3,886.77, 5,363.58 and 2,118.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.77 : 5,363.58 = 2,118.27 : x
2. Step 2: Convert to fraction form
   3,886.77/5,363.58 = 2,118.27/x
3. Step 3: Cross multiply
   3,886.77x = 5,363.58 × 2,118.27
4. Step 4: Simplify right side
   3,886.77x = 11,361,510.61
5. Step 5: Solve for x
   x = 11,361,510.61/3,886.77
6. Step 6: Final answer
   x = 2,923.12