Finding the Fourth Proportional to 2,826.58, 3,904.31 and 2,171.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.58 : 3,904.31 = 2,171.49 : x
2. Step 2: Convert to fraction form
   2,826.58/3,904.31 = 2,171.49/x
3. Step 3: Cross multiply
   2,826.58x = 3,904.31 × 2,171.49
4. Step 4: Simplify right side
   2,826.58x = 8,478,175.55
5. Step 5: Solve for x
   x = 8,478,175.55/2,826.58
6. Step 6: Final answer
   x = 2,999.45