Finding the Fourth Proportional to 3,886.52, 5,363.22 and 2,117.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.52 : 5,363.22 = 2,117.96 : x
2. Step 2: Convert to fraction form
   3,886.52/5,363.22 = 2,117.96/x
3. Step 3: Cross multiply
   3,886.52x = 5,363.22 × 2,117.96
4. Step 4: Simplify right side
   3,886.52x = 11,359,085.43
5. Step 5: Solve for x
   x = 11,359,085.43/3,886.52
6. Step 6: Final answer
   x = 2,922.69