Finding the Fourth Proportional to 1,393.61, 1,921.52 and 896.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.61 : 1,921.52 = 896.27 : x
2. Step 2: Convert to fraction form
   1,393.61/1,921.52 = 896.27/x
3. Step 3: Cross multiply
   1,393.61x = 1,921.52 × 896.27
4. Step 4: Simplify right side
   1,393.61x = 1,722,193.36
5. Step 5: Solve for x
   x = 1,722,193.36/1,393.61
6. Step 6: Final answer
   x = 1,235.78