Finding the Fourth Proportional to 1,105.49, 1,655.31 and 885.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.49 : 1,655.31 = 885.08 : x
2. Step 2: Convert to fraction form
   1,105.49/1,655.31 = 885.08/x
3. Step 3: Cross multiply
   1,105.49x = 1,655.31 × 885.08
4. Step 4: Simplify right side
   1,105.49x = 1,465,085.91
5. Step 5: Solve for x
   x = 1,465,085.91/1,105.49
6. Step 6: Final answer
   x = 1,325.28