Finding the Fourth Proportional to 1,553.10, 2,142.82 and 889.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.10 : 2,142.82 = 889.71 : x
2. Step 2: Convert to fraction form
   1,553.10/2,142.82 = 889.71/x
3. Step 3: Cross multiply
   1,553.10x = 2,142.82 × 889.71
4. Step 4: Simplify right side
   1,553.10x = 1,906,488.38
5. Step 5: Solve for x
   x = 1,906,488.38/1,553.10
6. Step 6: Final answer
   x = 1,227.54