Finding the Fourth Proportional to 13,934.80, 19,229.88 and 7,966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,934.80 : 19,229.88 = 7,966.72 : x
2. Step 2: Convert to fraction form
   13,934.80/19,229.88 = 7,966.72/x
3. Step 3: Cross multiply
   13,934.80x = 19,229.88 × 7,966.72
4. Step 4: Simplify right side
   13,934.80x = 153,199,069.59
5. Step 5: Solve for x
   x = 153,199,069.59/13,934.80
6. Step 6: Final answer
   x = 10,993.99