Finding the Fourth Proportional to 1,426.90, 1,968.32 and 896.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.90 : 1,968.32 = 896.56 : x
2. Step 2: Convert to fraction form
   1,426.90/1,968.32 = 896.56/x
3. Step 3: Cross multiply
   1,426.90x = 1,968.32 × 896.56
4. Step 4: Simplify right side
   1,426.90x = 1,764,716.98
5. Step 5: Solve for x
   x = 1,764,716.98/1,426.90
6. Step 6: Final answer
   x = 1,236.75