Finding the Fourth Proportional to 3,687.12, 5,089.37 and 2,116.26

Step by Step Solution

1. Step 1: Write the proportion equation
   3,687.12 : 5,089.37 = 2,116.26 : x
2. Step 2: Convert to fraction form
   3,687.12/5,089.37 = 2,116.26/x
3. Step 3: Cross multiply
   3,687.12x = 5,089.37 × 2,116.26
4. Step 4: Simplify right side
   3,687.12x = 10,770,419.57
5. Step 5: Solve for x
   x = 10,770,419.57/3,687.12
6. Step 6: Final answer
   x = 2,921.09