Finding the Fourth Proportional to 12,669.48, 17,426.12 and 10,384.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,669.48 : 17,426.12 = 10,384.40 : x
2. Step 2: Convert to fraction form
   12,669.48/17,426.12 = 10,384.40/x
3. Step 3: Cross multiply
   12,669.48x = 17,426.12 × 10,384.40
4. Step 4: Simplify right side
   12,669.48x = 180,959,661.48
5. Step 5: Solve for x
   x = 180,959,661.48/12,669.48
6. Step 6: Final answer
   x = 14,283.12