Finding the Fourth Proportional to 2,016.40, 3,025.12 and 783.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.40 : 3,025.12 = 783.48 : x
2. Step 2: Convert to fraction form
   2,016.40/3,025.12 = 783.48/x
3. Step 3: Cross multiply
   2,016.40x = 3,025.12 × 783.48
4. Step 4: Simplify right side
   2,016.40x = 2,370,121.02
5. Step 5: Solve for x
   x = 2,370,121.02/2,016.40
6. Step 6: Final answer
   x = 1,175.42