Finding the Fourth Proportional to 1,426.21, 1,968.16 and 805.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.21 : 1,968.16 = 805.21 : x
2. Step 2: Convert to fraction form
   1,426.21/1,968.16 = 805.21/x
3. Step 3: Cross multiply
   1,426.21x = 1,968.16 × 805.21
4. Step 4: Simplify right side
   1,426.21x = 1,584,772.27
5. Step 5: Solve for x
   x = 1,584,772.27/1,426.21
6. Step 6: Final answer
   x = 1,111.18