Finding the Fourth Proportional to 1,408.86, 1,944.54 and 885.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.86 : 1,944.54 = 885.60 : x
2. Step 2: Convert to fraction form
   1,408.86/1,944.54 = 885.60/x
3. Step 3: Cross multiply
   1,408.86x = 1,944.54 × 885.60
4. Step 4: Simplify right side
   1,408.86x = 1,722,084.62
5. Step 5: Solve for x
   x = 1,722,084.62/1,408.86
6. Step 6: Final answer
   x = 1,222.32