Finding the Fourth Proportional to 1,399.72, 2,098.32 and 1,322.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.72 : 2,098.32 = 1,322.38 : x
2. Step 2: Convert to fraction form
   1,399.72/2,098.32 = 1,322.38/x
3. Step 3: Cross multiply
   1,399.72x = 2,098.32 × 1,322.38
4. Step 4: Simplify right side
   1,399.72x = 2,774,776.40
5. Step 5: Solve for x
   x = 2,774,776.40/1,399.72
6. Step 6: Final answer
   x = 1,982.38