Finding the Fourth Proportional to 447,654.89, 617,743.59 and 243,700.59

Step by Step Solution

1. Step 1: Write the proportion equation
   447,654.89 : 617,743.59 = 243,700.59 : x
2. Step 2: Convert to fraction form
   447,654.89/617,743.59 = 243,700.59/x
3. Step 3: Cross multiply
   447,654.89x = 617,743.59 × 243,700.59
4. Step 4: Simplify right side
   447,654.89x = 150,544,477,351.72
5. Step 5: Solve for x
   x = 150,544,477,351.72/447,654.89
6. Step 6: Final answer
   x = 336,295.84