Finding the Fourth Proportional to 12,860, 19,290 and 3,626

Step by Step Solution

1. Step 1: Write the proportion equation
   12,860 : 19,290 = 3,626 : x
2. Step 2: Convert to fraction form
   12,860/19,290 = 3,626/x
3. Step 3: Cross multiply
   12,860x = 19,290 × 3,626
4. Step 4: Simplify right side
   12,860x = 69,945,540
5. Step 5: Solve for x
   x = 69,945,540/12,860
6. Step 6: Final answer
   x = 5,439