Finding the Fourth Proportional to 629,499.78, 868,710.06 and 343,019.76

Step by Step Solution

1. Step 1: Write the proportion equation
   629,499.78 : 868,710.06 = 343,019.76 : x
2. Step 2: Convert to fraction form
   629,499.78/868,710.06 = 343,019.76/x
3. Step 3: Cross multiply
   629,499.78x = 868,710.06 × 343,019.76
4. Step 4: Simplify right side
   629,499.78x = 297,984,716,290.79
5. Step 5: Solve for x
   x = 297,984,716,290.79/629,499.78
6. Step 6: Final answer
   x = 473,367.47