Finding the Fourth Proportional to 447,789.38, 617,940.50 and 243,842.72

Step by Step Solution

1. Step 1: Write the proportion equation
   447,789.38 : 617,940.50 = 243,842.72 : x
2. Step 2: Convert to fraction form
   447,789.38/617,940.50 = 243,842.72/x
3. Step 3: Cross multiply
   447,789.38x = 617,940.50 × 243,842.72
4. Step 4: Simplify right side
   447,789.38x = 150,680,288,009.24
5. Step 5: Solve for x
   x = 150,680,288,009.24/447,789.38
6. Step 6: Final answer
   x = 336,498.13