Finding the Fourth Proportional to 3,396.69, 5,099.90 and 2,521.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,396.69 : 5,099.90 = 2,521.89 : x
2. Step 2: Convert to fraction form
   3,396.69/5,099.90 = 2,521.89/x
3. Step 3: Cross multiply
   3,396.69x = 5,099.90 × 2,521.89
4. Step 4: Simplify right side
   3,396.69x = 12,861,386.81
5. Step 5: Solve for x
   x = 12,861,386.81/3,396.69
6. Step 6: Final answer
   x = 3,786.45