Finding the Fourth Proportional to 2,147.89, 3,223.28 and 993.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.89 : 3,223.28 = 993.73 : x
2. Step 2: Convert to fraction form
   2,147.89/3,223.28 = 993.73/x
3. Step 3: Cross multiply
   2,147.89x = 3,223.28 × 993.73
4. Step 4: Simplify right side
   2,147.89x = 3,203,070.03
5. Step 5: Solve for x
   x = 3,203,070.03/2,147.89
6. Step 6: Final answer
   x = 1,491.26