Finding the Fourth Proportional to 2,182.85, 3,274.31 and 1,215.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.85 : 3,274.31 = 1,215.10 : x
2. Step 2: Convert to fraction form
   2,182.85/3,274.31 = 1,215.10/x
3. Step 3: Cross multiply
   2,182.85x = 3,274.31 × 1,215.10
4. Step 4: Simplify right side
   2,182.85x = 3,978,614.38
5. Step 5: Solve for x
   x = 3,978,614.38/2,182.85
6. Step 6: Final answer
   x = 1,822.67