Finding the Fourth Proportional to 12,426.96, 17,141.90 and 7,949.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426.96 : 17,141.90 = 7,949.06 : x
2. Step 2: Convert to fraction form
   12,426.96/17,141.90 = 7,949.06/x
3. Step 3: Cross multiply
   12,426.96x = 17,141.90 × 7,949.06
4. Step 4: Simplify right side
   12,426.96x = 136,261,991.61
5. Step 5: Solve for x
   x = 136,261,991.61/12,426.96
6. Step 6: Final answer
   x = 10,965.03