Finding the Fourth Proportional to 1,553.82, 2,144.16 and 890.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.82 : 2,144.16 = 890.56 : x
2. Step 2: Convert to fraction form
   1,553.82/2,144.16 = 890.56/x
3. Step 3: Cross multiply
   1,553.82x = 2,144.16 × 890.56
4. Step 4: Simplify right side
   1,553.82x = 1,909,503.13
5. Step 5: Solve for x
   x = 1,909,503.13/1,553.82
6. Step 6: Final answer
   x = 1,228.91