Finding the Fourth Proportional to 2,551.32, 3,519.18 and 1,668.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.32 : 3,519.18 = 1,668.15 : x
2. Step 2: Convert to fraction form
   2,551.32/3,519.18 = 1,668.15/x
3. Step 3: Cross multiply
   2,551.32x = 3,519.18 × 1,668.15
4. Step 4: Simplify right side
   2,551.32x = 5,870,520.12
5. Step 5: Solve for x
   x = 5,870,520.12/2,551.32
6. Step 6: Final answer
   x = 2,300.97