Finding the Fourth Proportional to 1,642.54, 2,464.48 and 668.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.54 : 2,464.48 = 668.72 : x
2. Step 2: Convert to fraction form
   1,642.54/2,464.48 = 668.72/x
3. Step 3: Cross multiply
   1,642.54x = 2,464.48 × 668.72
4. Step 4: Simplify right side
   1,642.54x = 1,648,047.07
5. Step 5: Solve for x
   x = 1,648,047.07/1,642.54
6. Step 6: Final answer
   x = 1,003.35