Finding the Fourth Proportional to 685,382.50, 945,696.63 and 443,631.52

Step by Step Solution

1. Step 1: Write the proportion equation
   685,382.50 : 945,696.63 = 443,631.52 : x
2. Step 2: Convert to fraction form
   685,382.50/945,696.63 = 443,631.52/x
3. Step 3: Cross multiply
   685,382.50x = 945,696.63 × 443,631.52
4. Step 4: Simplify right side
   685,382.50x = 419,540,833,425.78
5. Step 5: Solve for x
   x = 419,540,833,425.78/685,382.50
6. Step 6: Final answer
   x = 612,126.56