Finding the Fourth Proportional to 443,931.69, 612,657 and 250,356.72

Step by Step Solution

1. Step 1: Write the proportion equation
   443,931.69 : 612,657 = 250,356.72 : x
2. Step 2: Convert to fraction form
   443,931.69/612,657 = 250,356.72/x
3. Step 3: Cross multiply
   443,931.69x = 612,657 × 250,356.72
4. Step 4: Simplify right side
   443,931.69x = 153,382,797,005.04
5. Step 5: Solve for x
   x = 153,382,797,005.04/443,931.69
6. Step 6: Final answer
   x = 345,509.91