Finding the Fourth Proportional to 2,016.86, 3,023.09 and 783.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.86 : 3,023.09 = 783.90 : x
2. Step 2: Convert to fraction form
   2,016.86/3,023.09 = 783.90/x
3. Step 3: Cross multiply
   2,016.86x = 3,023.09 × 783.90
4. Step 4: Simplify right side
   2,016.86x = 2,369,800.25
5. Step 5: Solve for x
   x = 2,369,800.25/2,016.86
6. Step 6: Final answer
   x = 1,174.99