Finding the Fourth Proportional to 1,399.16, 1,929 and 1,134.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.16 : 1,929 = 1,134.32 : x
2. Step 2: Convert to fraction form
   1,399.16/1,929 = 1,134.32/x
3. Step 3: Cross multiply
   1,399.16x = 1,929 × 1,134.32
4. Step 4: Simplify right side
   1,399.16x = 2,188,103.28
5. Step 5: Solve for x
   x = 2,188,103.28/1,399.16
6. Step 6: Final answer
   x = 1,563.87