Finding the Fourth Proportional to 1,441.47, 1,989.32 and 812.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.47 : 1,989.32 = 812.06 : x
2. Step 2: Convert to fraction form
   1,441.47/1,989.32 = 812.06/x
3. Step 3: Cross multiply
   1,441.47x = 1,989.32 × 812.06
4. Step 4: Simplify right side
   1,441.47x = 1,615,447.20
5. Step 5: Solve for x
   x = 1,615,447.20/1,441.47
6. Step 6: Final answer
   x = 1,120.69