Finding the Fourth Proportional to 685,300.50, 945,583.47 and 443,549.52

Step by Step Solution

1. Step 1: Write the proportion equation
   685,300.50 : 945,583.47 = 443,549.52 : x
2. Step 2: Convert to fraction form
   685,300.50/945,583.47 = 443,549.52/x
3. Step 3: Cross multiply
   685,300.50x = 945,583.47 × 443,549.52
4. Step 4: Simplify right side
   685,300.50x = 419,413,094,238.43
5. Step 5: Solve for x
   x = 419,413,094,238.43/685,300.50
6. Step 6: Final answer
   x = 612,013.41