Finding the Fourth Proportional to 1,393.55, 1,922.91 and 896.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.55 : 1,922.91 = 896.86 : x
2. Step 2: Convert to fraction form
   1,393.55/1,922.91 = 896.86/x
3. Step 3: Cross multiply
   1,393.55x = 1,922.91 × 896.86
4. Step 4: Simplify right side
   1,393.55x = 1,724,571.45
5. Step 5: Solve for x
   x = 1,724,571.45/1,393.55
6. Step 6: Final answer
   x = 1,237.54