Finding the Fourth Proportional to 6,663.89, 9,196.31 and 3,679.91

Step by Step Solution

1. Step 1: Write the proportion equation
   6,663.89 : 9,196.31 = 3,679.91 : x
2. Step 2: Convert to fraction form
   6,663.89/9,196.31 = 3,679.91/x
3. Step 3: Cross multiply
   6,663.89x = 9,196.31 × 3,679.91
4. Step 4: Simplify right side
   6,663.89x = 33,841,574.73
5. Step 5: Solve for x
   x = 33,841,574.73/6,663.89
6. Step 6: Final answer
   x = 5,078.36