Finding the Fourth Proportional to 2,647.56, 3,971.46 and 1,003.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.56 : 3,971.46 = 1,003.90 : x
2. Step 2: Convert to fraction form
   2,647.56/3,971.46 = 1,003.90/x
3. Step 3: Cross multiply
   2,647.56x = 3,971.46 × 1,003.90
4. Step 4: Simplify right side
   2,647.56x = 3,986,948.69
5. Step 5: Solve for x
   x = 3,986,948.69/2,647.56
6. Step 6: Final answer
   x = 1,505.90