Finding the Fourth Proportional to 1,609.74, 2,221.43 and 1,020.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609.74 : 2,221.43 = 1,020.77 : x
2. Step 2: Convert to fraction form
   1,609.74/2,221.43 = 1,020.77/x
3. Step 3: Cross multiply
   1,609.74x = 2,221.43 × 1,020.77
4. Step 4: Simplify right side
   1,609.74x = 2,267,552.89
5. Step 5: Solve for x
   x = 2,267,552.89/1,609.74
6. Step 6: Final answer
   x = 1,408.65