Finding the Fourth Proportional to 3,686.56, 5,086.16 and 2,113.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686.56 : 5,086.16 = 2,113.52 : x
2. Step 2: Convert to fraction form
   3,686.56/5,086.16 = 2,113.52/x
3. Step 3: Cross multiply
   3,686.56x = 5,086.16 × 2,113.52
4. Step 4: Simplify right side
   3,686.56x = 10,749,700.88
5. Step 5: Solve for x
   x = 10,749,700.88/3,686.56
6. Step 6: Final answer
   x = 2,915.92