Finding the Fourth Proportional to 10,991.98, 16,491.80 and 7,992.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.98 : 16,491.80 = 7,992.82 : x
2. Step 2: Convert to fraction form
   10,991.98/16,491.80 = 7,992.82/x
3. Step 3: Cross multiply
   10,991.98x = 16,491.80 × 7,992.82
4. Step 4: Simplify right side
   10,991.98x = 131,815,988.88
5. Step 5: Solve for x
   x = 131,815,988.88/10,991.98
6. Step 6: Final answer
   x = 11,992.01