Finding the Fourth Proportional to 1,553.83, 2,144.40 and 890.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.83 : 2,144.40 = 890.84 : x
2. Step 2: Convert to fraction form
   1,553.83/2,144.40 = 890.84/x
3. Step 3: Cross multiply
   1,553.83x = 2,144.40 × 890.84
4. Step 4: Simplify right side
   1,553.83x = 1,910,317.30
5. Step 5: Solve for x
   x = 1,910,317.30/1,553.83
6. Step 6: Final answer
   x = 1,229.42