Finding the Fourth Proportional to 3,685.28, 5,086.15 and 2,113.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.28 : 5,086.15 = 2,113.34 : x
2. Step 2: Convert to fraction form
   3,685.28/5,086.15 = 2,113.34/x
3. Step 3: Cross multiply
   3,685.28x = 5,086.15 × 2,113.34
4. Step 4: Simplify right side
   3,685.28x = 10,748,733.53
5. Step 5: Solve for x
   x = 10,748,733.53/3,685.28
6. Step 6: Final answer
   x = 2,916.67