Finding the Fourth Proportional to 407,300.34, 611,397.45 and 323,598.54

Step by Step Solution

1. Step 1: Write the proportion equation
   407,300.34 : 611,397.45 = 323,598.54 : x
2. Step 2: Convert to fraction form
   407,300.34/611,397.45 = 323,598.54/x
3. Step 3: Cross multiply
   407,300.34x = 611,397.45 × 323,598.54
4. Step 4: Simplify right side
   407,300.34x = 197,847,322,179.72
5. Step 5: Solve for x
   x = 197,847,322,179.72/407,300.34
6. Step 6: Final answer
   x = 485,752.90