Finding the Fourth Proportional to 2,940.16, 4,410.89 and 992.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.16 : 4,410.89 = 992.31 : x
2. Step 2: Convert to fraction form
   2,940.16/4,410.89 = 992.31/x
3. Step 3: Cross multiply
   2,940.16x = 4,410.89 × 992.31
4. Step 4: Simplify right side
   2,940.16x = 4,376,970.26
5. Step 5: Solve for x
   x = 4,376,970.26/2,940.16
6. Step 6: Final answer
   x = 1,488.68