Finding the Fourth Proportional to 1,441.52, 1,989.34 and 812.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.52 : 1,989.34 = 812.07 : x
2. Step 2: Convert to fraction form
   1,441.52/1,989.34 = 812.07/x
3. Step 3: Cross multiply
   1,441.52x = 1,989.34 × 812.07
4. Step 4: Simplify right side
   1,441.52x = 1,615,483.33
5. Step 5: Solve for x
   x = 1,615,483.33/1,441.52
6. Step 6: Final answer
   x = 1,120.68