Finding the Fourth Proportional to 3,806.51, 5,251.50 and 2,389.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,806.51 : 5,251.50 = 2,389.59 : x
2. Step 2: Convert to fraction form
   3,806.51/5,251.50 = 2,389.59/x
3. Step 3: Cross multiply
   3,806.51x = 5,251.50 × 2,389.59
4. Step 4: Simplify right side
   3,806.51x = 12,548,931.89
5. Step 5: Solve for x
   x = 12,548,931.89/3,806.51
6. Step 6: Final answer
   x = 3,296.71