Finding the Fourth Proportional to 2,016.39, 2,781.63 and 1,229.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.39 : 2,781.63 = 1,229.07 : x
2. Step 2: Convert to fraction form
   2,016.39/2,781.63 = 1,229.07/x
3. Step 3: Cross multiply
   2,016.39x = 2,781.63 × 1,229.07
4. Step 4: Simplify right side
   2,016.39x = 3,418,817.98
5. Step 5: Solve for x
   x = 3,418,817.98/2,016.39
6. Step 6: Final answer
   x = 1,695.51