Finding the Fourth Proportional to 479,665.28, 661,920.72 and 264,800.72

Step by Step Solution

1. Step 1: Write the proportion equation
   479,665.28 : 661,920.72 = 264,800.72 : x
2. Step 2: Convert to fraction form
   479,665.28/661,920.72 = 264,800.72/x
3. Step 3: Cross multiply
   479,665.28x = 661,920.72 × 264,800.72
4. Step 4: Simplify right side
   479,665.28x = 175,277,079,929.32
5. Step 5: Solve for x
   x = 175,277,079,929.32/479,665.28
6. Step 6: Final answer
   x = 365,415.40