Finding the Fourth Proportional to 1,815.72, 2,722.32 and 994.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.72 : 2,722.32 = 994.38 : x
2. Step 2: Convert to fraction form
   1,815.72/2,722.32 = 994.38/x
3. Step 3: Cross multiply
   1,815.72x = 2,722.32 × 994.38
4. Step 4: Simplify right side
   1,815.72x = 2,707,020.56
5. Step 5: Solve for x
   x = 2,707,020.56/1,815.72
6. Step 6: Final answer
   x = 1,490.88