Finding the Fourth Proportional to 3,906.90, 5,391.50 and 2,114.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.90 : 5,391.50 = 2,114.37 : x
2. Step 2: Convert to fraction form
   3,906.90/5,391.50 = 2,114.37/x
3. Step 3: Cross multiply
   3,906.90x = 5,391.50 × 2,114.37
4. Step 4: Simplify right side
   3,906.90x = 11,399,615.28
5. Step 5: Solve for x
   x = 11,399,615.28/3,906.90
6. Step 6: Final answer
   x = 2,917.82