Finding the Fourth Proportional to 1,066.50, 1,470.49 and 889.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.50 : 1,470.49 = 889.72 : x
2. Step 2: Convert to fraction form
   1,066.50/1,470.49 = 889.72/x
3. Step 3: Cross multiply
   1,066.50x = 1,470.49 × 889.72
4. Step 4: Simplify right side
   1,066.50x = 1,308,324.36
5. Step 5: Solve for x
   x = 1,308,324.36/1,066.50
6. Step 6: Final answer
   x = 1,226.75