Finding the Fourth Proportional to 815,111.25, 1,222,273.61 and 341,669.49

Step by Step Solution

1. Step 1: Write the proportion equation
   815,111.25 : 1,222,273.61 = 341,669.49 : x
2. Step 2: Convert to fraction form
   815,111.25/1,222,273.61 = 341,669.49/x
3. Step 3: Cross multiply
   815,111.25x = 1,222,273.61 × 341,669.49
4. Step 4: Simplify right side
   815,111.25x = 417,613,597,880.44
5. Step 5: Solve for x
   x = 417,613,597,880.44/815,111.25
6. Step 6: Final answer
   x = 512,339.39