Finding the Fourth Proportional to 12,411.45, 17,131.79 and 7,947.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.45 : 17,131.79 = 7,947.23 : x
2. Step 2: Convert to fraction form
   12,411.45/17,131.79 = 7,947.23/x
3. Step 3: Cross multiply
   12,411.45x = 17,131.79 × 7,947.23
4. Step 4: Simplify right side
   12,411.45x = 136,150,150.05
5. Step 5: Solve for x
   x = 136,150,150.05/12,411.45
6. Step 6: Final answer
   x = 10,969.72