Finding the Fourth Proportional to 3,815.10, 5,714.55 and 3,086.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,815.10 : 5,714.55 = 3,086.10 : x
2. Step 2: Convert to fraction form
   3,815.10/5,714.55 = 3,086.10/x
3. Step 3: Cross multiply
   3,815.10x = 5,714.55 × 3,086.10
4. Step 4: Simplify right side
   3,815.10x = 17,635,672.76
5. Step 5: Solve for x
   x = 17,635,672.76/3,815.10
6. Step 6: Final answer
   x = 4,622.60