Finding the Fourth Proportional to 444,061.80, 661,871.39 and 418,840.25

Step by Step Solution

1. Step 1: Write the proportion equation
   444,061.80 : 661,871.39 = 418,840.25 : x
2. Step 2: Convert to fraction form
   444,061.80/661,871.39 = 418,840.25/x
3. Step 3: Cross multiply
   444,061.80x = 661,871.39 × 418,840.25
4. Step 4: Simplify right side
   444,061.80x = 277,218,373,051.89
5. Step 5: Solve for x
   x = 277,218,373,051.89/444,061.80
6. Step 6: Final answer
   x = 624,278.81