Finding the Fourth Proportional to 3,681.59, 5,080.32 and 2,109.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.59 : 5,080.32 = 2,109.38 : x
2. Step 2: Convert to fraction form
   3,681.59/5,080.32 = 2,109.38/x
3. Step 3: Cross multiply
   3,681.59x = 5,080.32 × 2,109.38
4. Step 4: Simplify right side
   3,681.59x = 10,716,300
5. Step 5: Solve for x
   x = 10,716,300/3,681.59
6. Step 6: Final answer
   x = 2,910.78