Finding the Fourth Proportional to 2,642.27, 3,963.55 and 998.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.27 : 3,963.55 = 998.67 : x
2. Step 2: Convert to fraction form
   2,642.27/3,963.55 = 998.67/x
3. Step 3: Cross multiply
   2,642.27x = 3,963.55 × 998.67
4. Step 4: Simplify right side
   2,642.27x = 3,958,275.98
5. Step 5: Solve for x
   x = 3,958,275.98/2,642.27
6. Step 6: Final answer
   x = 1,498.06