Finding the Fourth Proportional to 899,722.27, 1,241,616.83 and 491,825.78

Step by Step Solution

1. Step 1: Write the proportion equation
   899,722.27 : 1,241,616.83 = 491,825.78 : x
2. Step 2: Convert to fraction form
   899,722.27/1,241,616.83 = 491,825.78/x
3. Step 3: Cross multiply
   899,722.27x = 1,241,616.83 × 491,825.78
4. Step 4: Simplify right side
   899,722.27x = 610,659,164,631.25
5. Step 5: Solve for x
   x = 610,659,164,631.25/899,722.27
6. Step 6: Final answer
   x = 678,719.63