Finding the Fourth Proportional to 1,042.27, 1,564.72 and 889.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.27 : 1,564.72 = 889.18 : x
2. Step 2: Convert to fraction form
   1,042.27/1,564.72 = 889.18/x
3. Step 3: Cross multiply
   1,042.27x = 1,564.72 × 889.18
4. Step 4: Simplify right side
   1,042.27x = 1,391,311.59
5. Step 5: Solve for x
   x = 1,391,311.59/1,042.27
6. Step 6: Final answer
   x = 1,334.89