Finding the Fourth Proportional to 1,645.59, 2,269.89 and 1,016.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.59 : 2,269.89 = 1,016.31 : x
2. Step 2: Convert to fraction form
   1,645.59/2,269.89 = 1,016.31/x
3. Step 3: Cross multiply
   1,645.59x = 2,269.89 × 1,016.31
4. Step 4: Simplify right side
   1,645.59x = 2,306,911.91
5. Step 5: Solve for x
   x = 2,306,911.91/1,645.59
6. Step 6: Final answer
   x = 1,401.88