Finding the Fourth Proportional to 12,407.36, 17,123.56 and 8,629.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,407.36 : 17,123.56 = 8,629.52 : x
2. Step 2: Convert to fraction form
   12,407.36/17,123.56 = 8,629.52/x
3. Step 3: Cross multiply
   12,407.36x = 17,123.56 × 8,629.52
4. Step 4: Simplify right side
   12,407.36x = 147,768,103.49
5. Step 5: Solve for x
   x = 147,768,103.49/12,407.36
6. Step 6: Final answer
   x = 11,909.71