Finding the Fourth Proportional to 12,404.92, 17,109.35 and 8,628.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.92 : 17,109.35 = 8,628.10 : x
2. Step 2: Convert to fraction form
   12,404.92/17,109.35 = 8,628.10/x
3. Step 3: Cross multiply
   12,404.92x = 17,109.35 × 8,628.10
4. Step 4: Simplify right side
   12,404.92x = 147,621,182.74
5. Step 5: Solve for x
   x = 147,621,182.74/12,404.92
6. Step 6: Final answer
   x = 11,900.21