Finding the Fourth Proportional to 2,015.31, 2,782.08 and 1,518.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.31 : 2,782.08 = 1,518.15 : x
2. Step 2: Convert to fraction form
   2,015.31/2,782.08 = 1,518.15/x
3. Step 3: Cross multiply
   2,015.31x = 2,782.08 × 1,518.15
4. Step 4: Simplify right side
   2,015.31x = 4,223,614.75
5. Step 5: Solve for x
   x = 4,223,614.75/2,015.31
6. Step 6: Final answer
   x = 2,095.76