Finding the Fourth Proportional to 599,105.88, 899,105.14 and 439,594.01

Step by Step Solution

1. Step 1: Write the proportion equation
   599,105.88 : 899,105.14 = 439,594.01 : x
2. Step 2: Convert to fraction form
   599,105.88/899,105.14 = 439,594.01/x
3. Step 3: Cross multiply
   599,105.88x = 899,105.14 × 439,594.01
4. Step 4: Simplify right side
   599,105.88x = 395,241,229,958.18
5. Step 5: Solve for x
   x = 395,241,229,958.18/599,105.88
6. Step 6: Final answer
   x = 659,718.50