Finding the Fourth Proportional to 3,186.72, 4,380.69 and 2,847.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,186.72 : 4,380.69 = 2,847.06 : x
2. Step 2: Convert to fraction form
   3,186.72/4,380.69 = 2,847.06/x
3. Step 3: Cross multiply
   3,186.72x = 4,380.69 × 2,847.06
4. Step 4: Simplify right side
   3,186.72x = 12,472,087.27
5. Step 5: Solve for x
   x = 12,472,087.27/3,186.72
6. Step 6: Final answer
   x = 3,913.77