Finding the Fourth Proportional to 743,100.12, 1,025,903.25 and 489,189.42

Step by Step Solution

1. Step 1: Write the proportion equation
   743,100.12 : 1,025,903.25 = 489,189.42 : x
2. Step 2: Convert to fraction form
   743,100.12/1,025,903.25 = 489,189.42/x
3. Step 3: Cross multiply
   743,100.12x = 1,025,903.25 × 489,189.42
4. Step 4: Simplify right side
   743,100.12x = 501,861,015,843.62
5. Step 5: Solve for x
   x = 501,861,015,843.62/743,100.12
6. Step 6: Final answer
   x = 675,361.24