Finding the Fourth Proportional to 2,139.72, 3,203.83 and 2,016.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.72 : 3,203.83 = 2,016.88 : x
2. Step 2: Convert to fraction form
   2,139.72/3,203.83 = 2,016.88/x
3. Step 3: Cross multiply
   2,139.72x = 3,203.83 × 2,016.88
4. Step 4: Simplify right side
   2,139.72x = 6,461,740.65
5. Step 5: Solve for x
   x = 6,461,740.65/2,139.72
6. Step 6: Final answer
   x = 3,019.90