Finding the Fourth Proportional to 1,868.80, 2,578.56 and 1,518.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.80 : 2,578.56 = 1,518.88 : x
2. Step 2: Convert to fraction form
   1,868.80/2,578.56 = 1,518.88/x
3. Step 3: Cross multiply
   1,868.80x = 2,578.56 × 1,518.88
4. Step 4: Simplify right side
   1,868.80x = 3,916,523.21
5. Step 5: Solve for x
   x = 3,916,523.21/1,868.80
6. Step 6: Final answer
   x = 2,095.74