Finding the Fourth Proportional to 3,681.39, 5,079.77 and 2,168.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.39 : 5,079.77 = 2,168.05 : x
2. Step 2: Convert to fraction form
   3,681.39/5,079.77 = 2,168.05/x
3. Step 3: Cross multiply
   3,681.39x = 5,079.77 × 2,168.05
4. Step 4: Simplify right side
   3,681.39x = 11,013,171.81
5. Step 5: Solve for x
   x = 11,013,171.81/3,681.39
6. Step 6: Final answer
   x = 2,991.58