Finding the Fourth Proportional to 2,016.10, 3,026.55 and 1,139.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.10 : 3,026.55 = 1,139.30 : x
2. Step 2: Convert to fraction form
   2,016.10/3,026.55 = 1,139.30/x
3. Step 3: Cross multiply
   2,016.10x = 3,026.55 × 1,139.30
4. Step 4: Simplify right side
   2,016.10x = 3,448,148.42
5. Step 5: Solve for x
   x = 3,448,148.42/2,016.10
6. Step 6: Final answer
   x = 1,710.31