Finding the Fourth Proportional to 679,513.59, 1,019,393.42 and 279,932.31

Step by Step Solution

1. Step 1: Write the proportion equation
   679,513.59 : 1,019,393.42 = 279,932.31 : x
2. Step 2: Convert to fraction form
   679,513.59/1,019,393.42 = 279,932.31/x
3. Step 3: Cross multiply
   679,513.59x = 1,019,393.42 × 279,932.31
4. Step 4: Simplify right side
   679,513.59x = 285,361,157,407.88
5. Step 5: Solve for x
   x = 285,361,157,407.88/679,513.59
6. Step 6: Final answer
   x = 419,949.15