Finding the Fourth Proportional to 2,891.39, 4,338.43 and 917.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.39 : 4,338.43 = 917.33 : x
2. Step 2: Convert to fraction form
   2,891.39/4,338.43 = 917.33/x
3. Step 3: Cross multiply
   2,891.39x = 4,338.43 × 917.33
4. Step 4: Simplify right side
   2,891.39x = 3,979,783.98
5. Step 5: Solve for x
   x = 3,979,783.98/2,891.39
6. Step 6: Final answer
   x = 1,376.42