Finding the Fourth Proportional to 1,768.72, 2,657.82 and 1,668

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.72 : 2,657.82 = 1,668 : x
2. Step 2: Convert to fraction form
   1,768.72/2,657.82 = 1,668/x
3. Step 3: Cross multiply
   1,768.72x = 2,657.82 × 1,668
4. Step 4: Simplify right side
   1,768.72x = 4,433,243.76
5. Step 5: Solve for x
   x = 4,433,243.76/1,768.72
6. Step 6: Final answer
   x = 2,506.47