Finding the Fourth Proportional to 2,217.70, 3,322.18 and 1,240.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.70 : 3,322.18 = 1,240.82 : x
2. Step 2: Convert to fraction form
   2,217.70/3,322.18 = 1,240.82/x
3. Step 3: Cross multiply
   2,217.70x = 3,322.18 × 1,240.82
4. Step 4: Simplify right side
   2,217.70x = 4,122,227.39
5. Step 5: Solve for x
   x = 4,122,227.39/2,217.70
6. Step 6: Final answer
   x = 1,858.78