Finding the Fourth Proportional to 3,886.38, 5,363.33 and 2,118.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.38 : 5,363.33 = 2,118.11 : x
2. Step 2: Convert to fraction form
   3,886.38/5,363.33 = 2,118.11/x
3. Step 3: Cross multiply
   3,886.38x = 5,363.33 × 2,118.11
4. Step 4: Simplify right side
   3,886.38x = 11,360,085.50
5. Step 5: Solve for x
   x = 11,360,085.50/3,886.38
6. Step 6: Final answer
   x = 2,923.05