Finding the Fourth Proportional to 2,180.52, 3,272.20 and 812.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.52 : 3,272.20 = 812.52 : x
2. Step 2: Convert to fraction form
   2,180.52/3,272.20 = 812.52/x
3. Step 3: Cross multiply
   2,180.52x = 3,272.20 × 812.52
4. Step 4: Simplify right side
   2,180.52x = 2,658,727.94
5. Step 5: Solve for x
   x = 2,658,727.94/2,180.52
6. Step 6: Final answer
   x = 1,219.31