Finding the Fourth Proportional to 11,990.12, 17,952.89 and 7,819.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990.12 : 17,952.89 = 7,819.79 : x
2. Step 2: Convert to fraction form
   11,990.12/17,952.89 = 7,819.79/x
3. Step 3: Cross multiply
   11,990.12x = 17,952.89 × 7,819.79
4. Step 4: Simplify right side
   11,990.12x = 140,387,700.83
5. Step 5: Solve for x
   x = 140,387,700.83/11,990.12
6. Step 6: Final answer
   x = 11,708.62