Finding the Fourth Proportional to 447,049.83, 617,016.38 and 256,191.15

Step by Step Solution

1. Step 1: Write the proportion equation
   447,049.83 : 617,016.38 = 256,191.15 : x
2. Step 2: Convert to fraction form
   447,049.83/617,016.38 = 256,191.15/x
3. Step 3: Cross multiply
   447,049.83x = 617,016.38 × 256,191.15
4. Step 4: Simplify right side
   447,049.83x = 158,074,134,680.08
5. Step 5: Solve for x
   x = 158,074,134,680.08/447,049.83
6. Step 6: Final answer
   x = 353,593.99