Finding the Fourth Proportional to 685,510.37, 945,992.69 and 379,580.17

Step by Step Solution

1. Step 1: Write the proportion equation
   685,510.37 : 945,992.69 = 379,580.17 : x
2. Step 2: Convert to fraction form
   685,510.37/945,992.69 = 379,580.17/x
3. Step 3: Cross multiply
   685,510.37x = 945,992.69 × 379,580.17
4. Step 4: Simplify right side
   685,510.37x = 359,080,066,088.96
5. Step 5: Solve for x
   x = 359,080,066,088.96/685,510.37
6. Step 6: Final answer
   x = 523,814.20