Finding the Fourth Proportional to 855,061.47, 1,179,698.31 and 492,478.07

Step by Step Solution

1. Step 1: Write the proportion equation
   855,061.47 : 1,179,698.31 = 492,478.07 : x
2. Step 2: Convert to fraction form
   855,061.47/1,179,698.31 = 492,478.07/x
3. Step 3: Cross multiply
   855,061.47x = 1,179,698.31 × 492,478.07
4. Step 4: Simplify right side
   855,061.47x = 580,975,540,992.57
5. Step 5: Solve for x
   x = 580,975,540,992.57/855,061.47
6. Step 6: Final answer
   x = 679,454.71