Finding the Fourth Proportional to 12,411.44, 17,131.79 and 7,947.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.44 : 17,131.79 = 7,947.22 : x
2. Step 2: Convert to fraction form
   12,411.44/17,131.79 = 7,947.22/x
3. Step 3: Cross multiply
   12,411.44x = 17,131.79 × 7,947.22
4. Step 4: Simplify right side
   12,411.44x = 136,150,021.56
5. Step 5: Solve for x
   x = 136,150,021.56/12,411.44
6. Step 6: Final answer
   x = 10,969.72