Finding the Fourth Proportional to 3,689.91, 5,089.80 and 2,196.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.91 : 5,089.80 = 2,196.81 : x
2. Step 2: Convert to fraction form
   3,689.91/5,089.80 = 2,196.81/x
3. Step 3: Cross multiply
   3,689.91x = 5,089.80 × 2,196.81
4. Step 4: Simplify right side
   3,689.91x = 11,181,323.54
5. Step 5: Solve for x
   x = 11,181,323.54/3,689.91
6. Step 6: Final answer
   x = 3,030.24