Finding the Fourth Proportional to 3,685.21, 5,085.39 and 2,006.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.21 : 5,085.39 = 2,006.57 : x
2. Step 2: Convert to fraction form
   3,685.21/5,085.39 = 2,006.57/x
3. Step 3: Cross multiply
   3,685.21x = 5,085.39 × 2,006.57
4. Step 4: Simplify right side
   3,685.21x = 10,204,191.01
5. Step 5: Solve for x
   x = 10,204,191.01/3,685.21
6. Step 6: Final answer
   x = 2,768.96