Finding the Fourth Proportional to 1,328.00, 1,989.56 and 1,107.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.00 : 1,989.56 = 1,107.22 : x
2. Step 2: Convert to fraction form
   1,328.00/1,989.56 = 1,107.22/x
3. Step 3: Cross multiply
   1,328.00x = 1,989.56 × 1,107.22
4. Step 4: Simplify right side
   1,328.00x = 2,202,882.15
5. Step 5: Solve for x
   x = 2,202,882.15/1,328.00
6. Step 6: Final answer
   x = 1,658.80