Finding the Fourth Proportional to 3,685.62, 5,085.33 and 2,113.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.62 : 5,085.33 = 2,113.71 : x
2. Step 2: Convert to fraction form
   3,685.62/5,085.33 = 2,113.71/x
3. Step 3: Cross multiply
   3,685.62x = 5,085.33 × 2,113.71
4. Step 4: Simplify right side
   3,685.62x = 10,748,912.87
5. Step 5: Solve for x
   x = 10,748,912.87/3,685.62
6. Step 6: Final answer
   x = 2,916.45