Finding the Fourth Proportional to 12,629.39, 17,434.42 and 8,997.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,629.39 : 17,434.42 = 8,997.77 : x
2. Step 2: Convert to fraction form
   12,629.39/17,434.42 = 8,997.77/x
3. Step 3: Cross multiply
   12,629.39x = 17,434.42 × 8,997.77
4. Step 4: Simplify right side
   12,629.39x = 156,870,901.24
5. Step 5: Solve for x
   x = 156,870,901.24/12,629.39
6. Step 6: Final answer
   x = 12,421.10