Finding the Fourth Proportional to 1,665.18, 2,498.17 and 843.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.18 : 2,498.17 = 843.43 : x
2. Step 2: Convert to fraction form
   1,665.18/2,498.17 = 843.43/x
3. Step 3: Cross multiply
   1,665.18x = 2,498.17 × 843.43
4. Step 4: Simplify right side
   1,665.18x = 2,107,031.52
5. Step 5: Solve for x
   x = 2,107,031.52/1,665.18
6. Step 6: Final answer
   x = 1,265.35