Finding the Fourth Proportional to 13,929.88, 19,222.50 and 7,960.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,929.88 : 19,222.50 = 7,960.76 : x
2. Step 2: Convert to fraction form
   13,929.88/19,222.50 = 7,960.76/x
3. Step 3: Cross multiply
   13,929.88x = 19,222.50 × 7,960.76
4. Step 4: Simplify right side
   13,929.88x = 153,025,709.10
5. Step 5: Solve for x
   x = 153,025,709.10/13,929.88
6. Step 6: Final answer
   x = 10,985.43