Finding the Fourth Proportional to 1,404.08, 2,103.96 and 890

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.08 : 2,103.96 = 890 : x
2. Step 2: Convert to fraction form
   1,404.08/2,103.96 = 890/x
3. Step 3: Cross multiply
   1,404.08x = 2,103.96 × 890
4. Step 4: Simplify right side
   1,404.08x = 1,872,524.40
5. Step 5: Solve for x
   x = 1,872,524.40/1,404.08
6. Step 6: Final answer
   x = 1,333.63