Finding the Fourth Proportional to 3,688.49, 5,089.55 and 2,116.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.49 : 5,089.55 = 2,116.28 : x
2. Step 2: Convert to fraction form
   3,688.49/5,089.55 = 2,116.28/x
3. Step 3: Cross multiply
   3,688.49x = 5,089.55 × 2,116.28
4. Step 4: Simplify right side
   3,688.49x = 10,770,902.29
5. Step 5: Solve for x
   x = 10,770,902.29/3,688.49
6. Step 6: Final answer
   x = 2,920.14