Finding the Fourth Proportional to 1,664.42, 2,498.18 and 843.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.42 : 2,498.18 = 843.28 : x
2. Step 2: Convert to fraction form
   1,664.42/2,498.18 = 843.28/x
3. Step 3: Cross multiply
   1,664.42x = 2,498.18 × 843.28
4. Step 4: Simplify right side
   1,664.42x = 2,106,665.23
5. Step 5: Solve for x
   x = 2,106,665.23/1,664.42
6. Step 6: Final answer
   x = 1,265.71