Finding the Fourth Proportional to 1,393.43, 1,921.26 and 896.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.43 : 1,921.26 = 896.09 : x
2. Step 2: Convert to fraction form
   1,393.43/1,921.26 = 896.09/x
3. Step 3: Cross multiply
   1,393.43x = 1,921.26 × 896.09
4. Step 4: Simplify right side
   1,393.43x = 1,721,612.27
5. Step 5: Solve for x
   x = 1,721,612.27/1,393.43
6. Step 6: Final answer
   x = 1,235.53