Finding the Fourth Proportional to 1,324.83, 1,989.72 and 1,216.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,324.83 : 1,989.72 = 1,216.47 : x
2. Step 2: Convert to fraction form
   1,324.83/1,989.72 = 1,216.47/x
3. Step 3: Cross multiply
   1,324.83x = 1,989.72 × 1,216.47
4. Step 4: Simplify right side
   1,324.83x = 2,420,434.69
5. Step 5: Solve for x
   x = 2,420,434.69/1,324.83
6. Step 6: Final answer
   x = 1,826.98