Finding the Fourth Proportional to 12,947.24, 17,865.83 and 7,912.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,947.24 : 17,865.83 = 7,912.69 : x
2. Step 2: Convert to fraction form
   12,947.24/17,865.83 = 7,912.69/x
3. Step 3: Cross multiply
   12,947.24x = 17,865.83 × 7,912.69
4. Step 4: Simplify right side
   12,947.24x = 141,366,749.50
5. Step 5: Solve for x
   x = 141,366,749.50/12,947.24
6. Step 6: Final answer
   x = 10,918.68