Finding the Fourth Proportional to 3,685.80, 5,086.29 and 2,007.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.80 : 5,086.29 = 2,007.18 : x
2. Step 2: Convert to fraction form
   3,685.80/5,086.29 = 2,007.18/x
3. Step 3: Cross multiply
   3,685.80x = 5,086.29 × 2,007.18
4. Step 4: Simplify right side
   3,685.80x = 10,209,099.56
5. Step 5: Solve for x
   x = 10,209,099.56/3,685.80
6. Step 6: Final answer
   x = 2,769.85