Finding the Fourth Proportional to 801,282.18, 1,105,725.61 and 438,635.89

Step by Step Solution

1. Step 1: Write the proportion equation
   801,282.18 : 1,105,725.61 = 438,635.89 : x
2. Step 2: Convert to fraction form
   801,282.18/1,105,725.61 = 438,635.89/x
3. Step 3: Cross multiply
   801,282.18x = 1,105,725.61 × 438,635.89
4. Step 4: Simplify right side
   801,282.18x = 485,010,938,968.60
5. Step 5: Solve for x
   x = 485,010,938,968.60/801,282.18
6. Step 6: Final answer
   x = 605,293.55