Finding the Fourth Proportional to 2,012.78, 2,782.77 and 1,517.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.78 : 2,782.77 = 1,517.96 : x
2. Step 2: Convert to fraction form
   2,012.78/2,782.77 = 1,517.96/x
3. Step 3: Cross multiply
   2,012.78x = 2,782.77 × 1,517.96
4. Step 4: Simplify right side
   2,012.78x = 4,224,133.55
5. Step 5: Solve for x
   x = 4,224,133.55/2,012.78
6. Step 6: Final answer
   x = 2,098.66