Finding the Fourth Proportional to 2,647.57, 3,970.60 and 1,003.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.57 : 3,970.60 = 1,003.68 : x
2. Step 2: Convert to fraction form
   2,647.57/3,970.60 = 1,003.68/x
3. Step 3: Cross multiply
   2,647.57x = 3,970.60 × 1,003.68
4. Step 4: Simplify right side
   2,647.57x = 3,985,211.81
5. Step 5: Solve for x
   x = 3,985,211.81/2,647.57
6. Step 6: Final answer
   x = 1,505.23