Finding the Fourth Proportional to 6,824.98, 9,418.71 and 3,991.92

Step by Step Solution

1. Step 1: Write the proportion equation
   6,824.98 : 9,418.71 = 3,991.92 : x
2. Step 2: Convert to fraction form
   6,824.98/9,418.71 = 3,991.92/x
3. Step 3: Cross multiply
   6,824.98x = 9,418.71 × 3,991.92
4. Step 4: Simplify right side
   6,824.98x = 37,598,736.82
5. Step 5: Solve for x
   x = 37,598,736.82/6,824.98
6. Step 6: Final answer
   x = 5,508.99