Finding the Fourth Proportional to 854,366.69, 1,179,097.43 and 491,907.89

Step by Step Solution

1. Step 1: Write the proportion equation
   854,366.69 : 1,179,097.43 = 491,907.89 : x
2. Step 2: Convert to fraction form
   854,366.69/1,179,097.43 = 491,907.89/x
3. Step 3: Cross multiply
   854,366.69x = 1,179,097.43 × 491,907.89
4. Step 4: Simplify right side
   854,366.69x = 580,007,320,540.70
5. Step 5: Solve for x
   x = 580,007,320,540.70/854,366.69
6. Step 6: Final answer
   x = 678,873.99