Finding the Fourth Proportional to 2,185.27, 3,254.89 and 2,139.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.27 : 3,254.89 = 2,139.70 : x
2. Step 2: Convert to fraction form
   2,185.27/3,254.89 = 2,139.70/x
3. Step 3: Cross multiply
   2,185.27x = 3,254.89 × 2,139.70
4. Step 4: Simplify right side
   2,185.27x = 6,964,493.23
5. Step 5: Solve for x
   x = 6,964,493.23/2,185.27
6. Step 6: Final answer
   x = 3,187.02