Finding the Fourth Proportional to 2,015.47, 3,022.55 and 783.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.47 : 3,022.55 = 783.31 : x
2. Step 2: Convert to fraction form
   2,015.47/3,022.55 = 783.31/x
3. Step 3: Cross multiply
   2,015.47x = 3,022.55 × 783.31
4. Step 4: Simplify right side
   2,015.47x = 2,367,593.64
5. Step 5: Solve for x
   x = 2,367,593.64/2,015.47
6. Step 6: Final answer
   x = 1,174.71