Finding the Fourth Proportional to 12,685.12, 19,025.52 and 3,451.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.12 : 19,025.52 = 3,451.12 : x
2. Step 2: Convert to fraction form
   12,685.12/19,025.52 = 3,451.12/x
3. Step 3: Cross multiply
   12,685.12x = 19,025.52 × 3,451.12
4. Step 4: Simplify right side
   12,685.12x = 65,659,352.58
5. Step 5: Solve for x
   x = 65,659,352.58/12,685.12
6. Step 6: Final answer
   x = 5,176.09