Finding the Fourth Proportional to 3,687.69, 5,089.13 and 2,009.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,687.69 : 5,089.13 = 2,009.15 : x
2. Step 2: Convert to fraction form
   3,687.69/5,089.13 = 2,009.15/x
3. Step 3: Cross multiply
   3,687.69x = 5,089.13 × 2,009.15
4. Step 4: Simplify right side
   3,687.69x = 10,224,825.54
5. Step 5: Solve for x
   x = 10,224,825.54/3,687.69
6. Step 6: Final answer
   x = 2,772.69