Finding the Fourth Proportional to 6,665.79, 9,991.86 and 3,368.89

Step by Step Solution

1. Step 1: Write the proportion equation
   6,665.79 : 9,991.86 = 3,368.89 : x
2. Step 2: Convert to fraction form
   6,665.79/9,991.86 = 3,368.89/x
3. Step 3: Cross multiply
   6,665.79x = 9,991.86 × 3,368.89
4. Step 4: Simplify right side
   6,665.79x = 33,661,477.09
5. Step 5: Solve for x
   x = 33,661,477.09/6,665.79
6. Step 6: Final answer
   x = 5,049.88