Finding the Fourth Proportional to 605,162.72, 907,886.24 and 339,106.88

Step by Step Solution

1. Step 1: Write the proportion equation
   605,162.72 : 907,886.24 = 339,106.88 : x
2. Step 2: Convert to fraction form
   605,162.72/907,886.24 = 339,106.88/x
3. Step 3: Cross multiply
   605,162.72x = 907,886.24 × 339,106.88
4. Step 4: Simplify right side
   605,162.72x = 307,870,470,241.33
5. Step 5: Solve for x
   x = 307,870,470,241.33/605,162.72
6. Step 6: Final answer
   x = 508,739.98