Finding the Fourth Proportional to 2,992.43, 4,488.37 and 912.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,992.43 : 4,488.37 = 912.89 : x
2. Step 2: Convert to fraction form
   2,992.43/4,488.37 = 912.89/x
3. Step 3: Cross multiply
   2,992.43x = 4,488.37 × 912.89
4. Step 4: Simplify right side
   2,992.43x = 4,097,388.09
5. Step 5: Solve for x
   x = 4,097,388.09/2,992.43
6. Step 6: Final answer
   x = 1,369.25