Finding the Fourth Proportional to 856,976.72, 1,285,062.18 and 316,859.82

Step by Step Solution

1. Step 1: Write the proportion equation
   856,976.72 : 1,285,062.18 = 316,859.82 : x
2. Step 2: Convert to fraction form
   856,976.72/1,285,062.18 = 316,859.82/x
3. Step 3: Cross multiply
   856,976.72x = 1,285,062.18 × 316,859.82
4. Step 4: Simplify right side
   856,976.72x = 407,184,572,231.83
5. Step 5: Solve for x
   x = 407,184,572,231.83/856,976.72
6. Step 6: Final answer
   x = 475,140.76