Finding the Fourth Proportional to 3,681.48, 5,081.16 and 2,189.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.48 : 5,081.16 = 2,189.09 : x
2. Step 2: Convert to fraction form
   3,681.48/5,081.16 = 2,189.09/x
3. Step 3: Cross multiply
   3,681.48x = 5,081.16 × 2,189.09
4. Step 4: Simplify right side
   3,681.48x = 11,123,137.46
5. Step 5: Solve for x
   x = 11,123,137.46/3,681.48
6. Step 6: Final answer
   x = 3,021.37