Finding the Fourth Proportional to 3,685.16, 5,085.24 and 2,113.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.16 : 5,085.24 = 2,113.04 : x
2. Step 2: Convert to fraction form
   3,685.16/5,085.24 = 2,113.04/x
3. Step 3: Cross multiply
   3,685.16x = 5,085.24 × 2,113.04
4. Step 4: Simplify right side
   3,685.16x = 10,745,315.53
5. Step 5: Solve for x
   x = 10,745,315.53/3,685.16
6. Step 6: Final answer
   x = 2,915.83