Finding the Fourth Proportional to 2,642.54, 3,960.74 and 998.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.54 : 3,960.74 = 998.04 : x
2. Step 2: Convert to fraction form
   2,642.54/3,960.74 = 998.04/x
3. Step 3: Cross multiply
   2,642.54x = 3,960.74 × 998.04
4. Step 4: Simplify right side
   2,642.54x = 3,952,976.95
5. Step 5: Solve for x
   x = 3,952,976.95/2,642.54
6. Step 6: Final answer
   x = 1,495.90