Finding the Fourth Proportional to 12,426.28, 17,150.92 and 7,646.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426.28 : 17,150.92 = 7,646.20 : x
2. Step 2: Convert to fraction form
   12,426.28/17,150.92 = 7,646.20/x
3. Step 3: Cross multiply
   12,426.28x = 17,150.92 × 7,646.20
4. Step 4: Simplify right side
   12,426.28x = 131,139,364.50
5. Step 5: Solve for x
   x = 131,139,364.50/12,426.28
6. Step 6: Final answer
   x = 10,553.39