Finding the Fourth Proportional to 12,947.92, 17,867.68 and 7,910.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,947.92 : 17,867.68 = 7,910.32 : x
2. Step 2: Convert to fraction form
   12,947.92/17,867.68 = 7,910.32/x
3. Step 3: Cross multiply
   12,947.92x = 17,867.68 × 7,910.32
4. Step 4: Simplify right side
   12,947.92x = 141,339,066.46
5. Step 5: Solve for x
   x = 141,339,066.46/12,947.92
6. Step 6: Final answer
   x = 10,915.97