Finding the Fourth Proportional to 2,016.72, 2,782.98 and 1,230.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.72 : 2,782.98 = 1,230.84 : x
2. Step 2: Convert to fraction form
   2,016.72/2,782.98 = 1,230.84/x
3. Step 3: Cross multiply
   2,016.72x = 2,782.98 × 1,230.84
4. Step 4: Simplify right side
   2,016.72x = 3,425,403.10
5. Step 5: Solve for x
   x = 3,425,403.10/2,016.72
6. Step 6: Final answer
   x = 1,698.50