Finding the Fourth Proportional to 6,665.60, 9,198.78 and 3,681.56

Step by Step Solution

1. Step 1: Write the proportion equation
   6,665.60 : 9,198.78 = 3,681.56 : x
2. Step 2: Convert to fraction form
   6,665.60/9,198.78 = 3,681.56/x
3. Step 3: Cross multiply
   6,665.60x = 9,198.78 × 3,681.56
4. Step 4: Simplify right side
   6,665.60x = 33,865,860.50
5. Step 5: Solve for x
   x = 33,865,860.50/6,665.60
6. Step 6: Final answer
   x = 5,080.69