Finding the Fourth Proportional to 1,410.69, 1,945.85 and 885.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.69 : 1,945.85 = 885.81 : x
2. Step 2: Convert to fraction form
   1,410.69/1,945.85 = 885.81/x
3. Step 3: Cross multiply
   1,410.69x = 1,945.85 × 885.81
4. Step 4: Simplify right side
   1,410.69x = 1,723,648.96
5. Step 5: Solve for x
   x = 1,723,648.96/1,410.69
6. Step 6: Final answer
   x = 1,221.85