Finding the Fourth Proportional to 1,553.59, 2,144.00 and 890.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.59 : 2,144.00 = 890.57 : x
2. Step 2: Convert to fraction form
   1,553.59/2,144.00 = 890.57/x
3. Step 3: Cross multiply
   1,553.59x = 2,144.00 × 890.57
4. Step 4: Simplify right side
   1,553.59x = 1,909,377.61
5. Step 5: Solve for x
   x = 1,909,377.61/1,553.59
6. Step 6: Final answer
   x = 1,229.01