Finding the Fourth Proportional to 814,493.48, 1,222,216.50 and 341,139.20

Step by Step Solution

1. Step 1: Write the proportion equation
   814,493.48 : 1,222,216.50 = 341,139.20 : x
2. Step 2: Convert to fraction form
   814,493.48/1,222,216.50 = 341,139.20/x
3. Step 3: Cross multiply
   814,493.48x = 1,222,216.50 × 341,139.20
4. Step 4: Simplify right side
   814,493.48x = 416,945,959,036.80
5. Step 5: Solve for x
   x = 416,945,959,036.80/814,493.48
6. Step 6: Final answer
   x = 511,908.28