Finding the Fourth Proportional to 1,552.49, 2,142.59 and 889.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,552.49 : 2,142.59 = 889.21 : x
2. Step 2: Convert to fraction form
   1,552.49/2,142.59 = 889.21/x
3. Step 3: Cross multiply
   1,552.49x = 2,142.59 × 889.21
4. Step 4: Simplify right side
   1,552.49x = 1,905,212.45
5. Step 5: Solve for x
   x = 1,905,212.45/1,552.49
6. Step 6: Final answer
   x = 1,227.20