Finding the Fourth Proportional to 2,647.30, 3,971.64 and 1,003.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.30 : 3,971.64 = 1,003.88 : x
2. Step 2: Convert to fraction form
   2,647.30/3,971.64 = 1,003.88/x
3. Step 3: Cross multiply
   2,647.30x = 3,971.64 × 1,003.88
4. Step 4: Simplify right side
   2,647.30x = 3,987,049.96
5. Step 5: Solve for x
   x = 3,987,049.96/2,647.30
6. Step 6: Final answer
   x = 1,506.08