Finding the Fourth Proportional to 12,759.16, 19,139.55 and 3,399.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,759.16 : 19,139.55 = 3,399.03 : x
2. Step 2: Convert to fraction form
   12,759.16/19,139.55 = 3,399.03/x
3. Step 3: Cross multiply
   12,759.16x = 19,139.55 × 3,399.03
4. Step 4: Simplify right side
   12,759.16x = 65,055,904.64
5. Step 5: Solve for x
   x = 65,055,904.64/12,759.16
6. Step 6: Final answer
   x = 5,098.76