Finding the Fourth Proportional to 1,393.98, 1,922.56 and 896.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.98 : 1,922.56 = 896.66 : x
2. Step 2: Convert to fraction form
   1,393.98/1,922.56 = 896.66/x
3. Step 3: Cross multiply
   1,393.98x = 1,922.56 × 896.66
4. Step 4: Simplify right side
   1,393.98x = 1,723,882.65
5. Step 5: Solve for x
   x = 1,723,882.65/1,393.98
6. Step 6: Final answer
   x = 1,236.66