Finding the Fourth Proportional to 3,685.14, 5,085.18 and 2,113.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.14 : 5,085.18 = 2,113.20 : x
2. Step 2: Convert to fraction form
   3,685.14/5,085.18 = 2,113.20/x
3. Step 3: Cross multiply
   3,685.14x = 5,085.18 × 2,113.20
4. Step 4: Simplify right side
   3,685.14x = 10,746,002.38
5. Step 5: Solve for x
   x = 10,746,002.38/3,685.14
6. Step 6: Final answer
   x = 2,916.04