Finding the Fourth Proportional to 1,426.40, 1,968.18 and 805.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.40 : 1,968.18 = 805.40 : x
2. Step 2: Convert to fraction form
   1,426.40/1,968.18 = 805.40/x
3. Step 3: Cross multiply
   1,426.40x = 1,968.18 × 805.40
4. Step 4: Simplify right side
   1,426.40x = 1,585,172.17
5. Step 5: Solve for x
   x = 1,585,172.17/1,426.40
6. Step 6: Final answer
   x = 1,111.31