Finding the Fourth Proportional to 1,409.36, 1,945.04 and 885.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.36 : 1,945.04 = 885.38 : x
2. Step 2: Convert to fraction form
   1,409.36/1,945.04 = 885.38/x
3. Step 3: Cross multiply
   1,409.36x = 1,945.04 × 885.38
4. Step 4: Simplify right side
   1,409.36x = 1,722,085.36
5. Step 5: Solve for x
   x = 1,722,085.36/1,409.36
6. Step 6: Final answer
   x = 1,221.90