Finding the Fourth Proportional to 2,940.66, 4,410.72 and 992.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.66 : 4,410.72 = 992.88 : x
2. Step 2: Convert to fraction form
   2,940.66/4,410.72 = 992.88/x
3. Step 3: Cross multiply
   2,940.66x = 4,410.72 × 992.88
4. Step 4: Simplify right side
   2,940.66x = 4,379,315.67
5. Step 5: Solve for x
   x = 4,379,315.67/2,940.66
6. Step 6: Final answer
   x = 1,489.23