Finding the Fourth Proportional to 12,914.88, 17,821.92 and 7,945.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,914.88 : 17,821.92 = 7,945.92 : x
2. Step 2: Convert to fraction form
   12,914.88/17,821.92 = 7,945.92/x
3. Step 3: Cross multiply
   12,914.88x = 17,821.92 × 7,945.92
4. Step 4: Simplify right side
   12,914.88x = 141,611,550.57
5. Step 5: Solve for x
   x = 141,611,550.57/12,914.88
6. Step 6: Final answer
   x = 10,964.99