Finding the Fourth Proportional to 685,010.72, 945,694.82 and 413,147.16

Step by Step Solution

1. Step 1: Write the proportion equation
   685,010.72 : 945,694.82 = 413,147.16 : x
2. Step 2: Convert to fraction form
   685,010.72/945,694.82 = 413,147.16/x
3. Step 3: Cross multiply
   685,010.72x = 945,694.82 × 413,147.16
4. Step 4: Simplify right side
   685,010.72x = 390,711,129,109.71
5. Step 5: Solve for x
   x = 390,711,129,109.71/685,010.72
6. Step 6: Final answer
   x = 570,372.28