Finding the Fourth Proportional to 12,685, 19,027.56 and 3,451

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685 : 19,027.56 = 3,451 : x
2. Step 2: Convert to fraction form
   12,685/19,027.56 = 3,451/x
3. Step 3: Cross multiply
   12,685x = 19,027.56 × 3,451
4. Step 4: Simplify right side
   12,685x = 65,664,109.56
5. Step 5: Solve for x
   x = 65,664,109.56/12,685
6. Step 6: Final answer
   x = 5,176.52