Finding the Fourth Proportional to 3,994.28, 5,511.86 and 2,315.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,994.28 : 5,511.86 = 2,315.54 : x
2. Step 2: Convert to fraction form
   3,994.28/5,511.86 = 2,315.54/x
3. Step 3: Cross multiply
   3,994.28x = 5,511.86 × 2,315.54
4. Step 4: Simplify right side
   3,994.28x = 12,762,932.30
5. Step 5: Solve for x
   x = 12,762,932.30/3,994.28
6. Step 6: Final answer
   x = 3,195.30