Finding the Fourth Proportional to 3,886.34, 5,363.24 and 2,117.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.34 : 5,363.24 = 2,117.94 : x
2. Step 2: Convert to fraction form
   3,886.34/5,363.24 = 2,117.94/x
3. Step 3: Cross multiply
   3,886.34x = 5,363.24 × 2,117.94
4. Step 4: Simplify right side
   3,886.34x = 11,359,020.53
5. Step 5: Solve for x
   x = 11,359,020.53/3,886.34
6. Step 6: Final answer
   x = 2,922.81