Finding the Fourth Proportional to 3,885.91, 5,362.42 and 2,117.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,885.91 : 5,362.42 = 2,117.48 : x
2. Step 2: Convert to fraction form
   3,885.91/5,362.42 = 2,117.48/x
3. Step 3: Cross multiply
   3,885.91x = 5,362.42 × 2,117.48
4. Step 4: Simplify right side
   3,885.91x = 11,354,817.10
5. Step 5: Solve for x
   x = 11,354,817.10/3,885.91
6. Step 6: Final answer
   x = 2,922.05