Finding the Fourth Proportional to 743,068.79, 1,025,443.89 and 420,770.60

Step by Step Solution

1. Step 1: Write the proportion equation
   743,068.79 : 1,025,443.89 = 420,770.60 : x
2. Step 2: Convert to fraction form
   743,068.79/1,025,443.89 = 420,770.60/x
3. Step 3: Cross multiply
   743,068.79x = 1,025,443.89 × 420,770.60
4. Step 4: Simplify right side
   743,068.79x = 431,476,635,734.42
5. Step 5: Solve for x
   x = 431,476,635,734.42/743,068.79
6. Step 6: Final answer
   x = 580,668.50