Finding the Fourth Proportional to 5,389.84, 8,081.71 and 2,099.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,389.84 : 8,081.71 = 2,099.15 : x
2. Step 2: Convert to fraction form
   5,389.84/8,081.71 = 2,099.15/x
3. Step 3: Cross multiply
   5,389.84x = 8,081.71 × 2,099.15
4. Step 4: Simplify right side
   5,389.84x = 16,964,675.89
5. Step 5: Solve for x
   x = 16,964,675.89/5,389.84
6. Step 6: Final answer
   x = 3,147.53