Finding the Fourth Proportional to 1,445.04, 1,993.88 and 885.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.04 : 1,993.88 = 885.60 : x
2. Step 2: Convert to fraction form
   1,445.04/1,993.88 = 885.60/x
3. Step 3: Cross multiply
   1,445.04x = 1,993.88 × 885.60
4. Step 4: Simplify right side
   1,445.04x = 1,765,782.34
5. Step 5: Solve for x
   x = 1,765,782.34/1,445.04
6. Step 6: Final answer
   x = 1,221.96