Finding the Fourth Proportional to 2,142.72, 3,213.54 and 843.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.72 : 3,213.54 = 843.48 : x
2. Step 2: Convert to fraction form
   2,142.72/3,213.54 = 843.48/x
3. Step 3: Cross multiply
   2,142.72x = 3,213.54 × 843.48
4. Step 4: Simplify right side
   2,142.72x = 2,710,556.72
5. Step 5: Solve for x
   x = 2,710,556.72/2,142.72
6. Step 6: Final answer
   x = 1,265.01