Finding the Fourth Proportional to 685,855.88, 946,468.71 and 379,931.31

Step by Step Solution

1. Step 1: Write the proportion equation
   685,855.88 : 946,468.71 = 379,931.31 : x
2. Step 2: Convert to fraction form
   685,855.88/946,468.71 = 379,931.31/x
3. Step 3: Cross multiply
   685,855.88x = 946,468.71 × 379,931.31
4. Step 4: Simplify right side
   685,855.88x = 359,593,095,439.57
5. Step 5: Solve for x
   x = 359,593,095,439.57/685,855.88
6. Step 6: Final answer
   x = 524,298.34