Finding the Fourth Proportional to 612,086.43, 844,662.45 and 340,147.35

Step by Step Solution

1. Step 1: Write the proportion equation
   612,086.43 : 844,662.45 = 340,147.35 : x
2. Step 2: Convert to fraction form
   612,086.43/844,662.45 = 340,147.35/x
3. Step 3: Cross multiply
   612,086.43x = 844,662.45 × 340,147.35
4. Step 4: Simplify right side
   612,086.43x = 287,309,694,012.01
5. Step 5: Solve for x
   x = 287,309,694,012.01/612,086.43
6. Step 6: Final answer
   x = 469,393.99