Finding the Fourth Proportional to 1,441.89, 1,989.65 and 812.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.89 : 1,989.65 = 812.37 : x
2. Step 2: Convert to fraction form
   1,441.89/1,989.65 = 812.37/x
3. Step 3: Cross multiply
   1,441.89x = 1,989.65 × 812.37
4. Step 4: Simplify right side
   1,441.89x = 1,616,327.91
5. Step 5: Solve for x
   x = 1,616,327.91/1,441.89
6. Step 6: Final answer
   x = 1,120.98