Finding the Fourth Proportional to 12,410.35, 17,143.72 and 11,289.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,410.35 : 17,143.72 = 11,289.31 : x
2. Step 2: Convert to fraction form
   12,410.35/17,143.72 = 11,289.31/x
3. Step 3: Cross multiply
   12,410.35x = 17,143.72 × 11,289.31
4. Step 4: Simplify right side
   12,410.35x = 193,540,698.55
5. Step 5: Solve for x
   x = 193,540,698.55/12,410.35
6. Step 6: Final answer
   x = 15,595.11