Finding the Fourth Proportional to 1,399.53, 1,932.72 and 1,268.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.53 : 1,932.72 = 1,268.31 : x
2. Step 2: Convert to fraction form
   1,399.53/1,932.72 = 1,268.31/x
3. Step 3: Cross multiply
   1,399.53x = 1,932.72 × 1,268.31
4. Step 4: Simplify right side
   1,399.53x = 2,451,288.10
5. Step 5: Solve for x
   x = 2,451,288.10/1,399.53
6. Step 6: Final answer
   x = 1,751.51