Finding the Fourth Proportional to 3,688.10, 5,089.49 and 2,116.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.10 : 5,089.49 = 2,116.09 : x
2. Step 2: Convert to fraction form
   3,688.10/5,089.49 = 2,116.09/x
3. Step 3: Cross multiply
   3,688.10x = 5,089.49 × 2,116.09
4. Step 4: Simplify right side
   3,688.10x = 10,769,818.89
5. Step 5: Solve for x
   x = 10,769,818.89/3,688.10
6. Step 6: Final answer
   x = 2,920.15