Finding the Fourth Proportional to 12,758.94, 19,139.37 and 3,398.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,758.94 : 19,139.37 = 3,398.92 : x
2. Step 2: Convert to fraction form
   12,758.94/19,139.37 = 3,398.92/x
3. Step 3: Cross multiply
   12,758.94x = 19,139.37 × 3,398.92
4. Step 4: Simplify right side
   12,758.94x = 65,053,187.48
5. Step 5: Solve for x
   x = 65,053,187.48/12,758.94
6. Step 6: Final answer
   x = 5,098.64