Finding the Fourth Proportional to 1,399.68, 2,096.64 and 1,330.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.68 : 2,096.64 = 1,330.56 : x
2. Step 2: Convert to fraction form
   1,399.68/2,096.64 = 1,330.56/x
3. Step 3: Cross multiply
   1,399.68x = 2,096.64 × 1,330.56
4. Step 4: Simplify right side
   1,399.68x = 2,789,705.32
5. Step 5: Solve for x
   x = 2,789,705.32/1,399.68
6. Step 6: Final answer
   x = 1,993.10