Finding the Fourth Proportional to 2,182.20, 3,011.22 and 1,238.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.20 : 3,011.22 = 1,238.10 : x
2. Step 2: Convert to fraction form
   2,182.20/3,011.22 = 1,238.10/x
3. Step 3: Cross multiply
   2,182.20x = 3,011.22 × 1,238.10
4. Step 4: Simplify right side
   2,182.20x = 3,728,191.48
5. Step 5: Solve for x
   x = 3,728,191.48/2,182.20
6. Step 6: Final answer
   x = 1,708.46