Finding the Fourth Proportional to 1,401.68, 2,103.60 and 1,128.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.68 : 2,103.60 = 1,128.44 : x
2. Step 2: Convert to fraction form
   1,401.68/2,103.60 = 1,128.44/x
3. Step 3: Cross multiply
   1,401.68x = 2,103.60 × 1,128.44
4. Step 4: Simplify right side
   1,401.68x = 2,373,786.38
5. Step 5: Solve for x
   x = 2,373,786.38/1,401.68
6. Step 6: Final answer
   x = 1,693.53