Finding the Fourth Proportional to 405,819.72, 560,016.72 and 224,530.92

Step by Step Solution

1. Step 1: Write the proportion equation
   405,819.72 : 560,016.72 = 224,530.92 : x
2. Step 2: Convert to fraction form
   405,819.72/560,016.72 = 224,530.92/x
3. Step 3: Cross multiply
   405,819.72x = 560,016.72 × 224,530.92
4. Step 4: Simplify right side
   405,819.72x = 125,741,069,356.98
5. Step 5: Solve for x
   x = 125,741,069,356.98/405,819.72
6. Step 6: Final answer
   x = 309,844.65