Finding the Fourth Proportional to 2,216.06, 3,323.73 and 1,288.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.06 : 3,323.73 = 1,288.70 : x
2. Step 2: Convert to fraction form
   2,216.06/3,323.73 = 1,288.70/x
3. Step 3: Cross multiply
   2,216.06x = 3,323.73 × 1,288.70
4. Step 4: Simplify right side
   2,216.06x = 4,283,290.85
5. Step 5: Solve for x
   x = 4,283,290.85/2,216.06
6. Step 6: Final answer
   x = 1,932.84