Finding the Fourth Proportional to 2,648.43, 3,971.73 and 1,005.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.43 : 3,971.73 = 1,005.45 : x
2. Step 2: Convert to fraction form
   2,648.43/3,971.73 = 1,005.45/x
3. Step 3: Cross multiply
   2,648.43x = 3,971.73 × 1,005.45
4. Step 4: Simplify right side
   2,648.43x = 3,993,364.80
5. Step 5: Solve for x
   x = 3,993,364.80/2,648.43
6. Step 6: Final answer
   x = 1,507.82