Finding the Fourth Proportional to 3,685.60, 5,086.04 and 2,113.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.60 : 5,086.04 = 2,113.59 : x
2. Step 2: Convert to fraction form
   3,685.60/5,086.04 = 2,113.59/x
3. Step 3: Cross multiply
   3,685.60x = 5,086.04 × 2,113.59
4. Step 4: Simplify right side
   3,685.60x = 10,749,823.68
5. Step 5: Solve for x
   x = 10,749,823.68/3,685.60
6. Step 6: Final answer
   x = 2,916.71