Finding the Fourth Proportional to 2,645.76, 3,968.69 and 1,003.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.76 : 3,968.69 = 1,003.08 : x
2. Step 2: Convert to fraction form
   2,645.76/3,968.69 = 1,003.08/x
3. Step 3: Cross multiply
   2,645.76x = 3,968.69 × 1,003.08
4. Step 4: Simplify right side
   2,645.76x = 3,980,913.57
5. Step 5: Solve for x
   x = 3,980,913.57/2,645.76
6. Step 6: Final answer
   x = 1,504.64