Finding the Fourth Proportional to 2,940.57, 4,411.52 and 992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.57 : 4,411.52 = 992.72 : x
2. Step 2: Convert to fraction form
   2,940.57/4,411.52 = 992.72/x
3. Step 3: Cross multiply
   2,940.57x = 4,411.52 × 992.72
4. Step 4: Simplify right side
   2,940.57x = 4,379,377.11
5. Step 5: Solve for x
   x = 4,379,377.11/2,940.57
6. Step 6: Final answer
   x = 1,489.30