Finding the Fourth Proportional to 12,734.45, 19,081.47 and 8,559.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,734.45 : 19,081.47 = 8,559.10 : x
2. Step 2: Convert to fraction form
   12,734.45/19,081.47 = 8,559.10/x
3. Step 3: Cross multiply
   12,734.45x = 19,081.47 × 8,559.10
4. Step 4: Simplify right side
   12,734.45x = 163,320,265.83
5. Step 5: Solve for x
   x = 163,320,265.83/12,734.45
6. Step 6: Final answer
   x = 12,825.08