Finding the Fourth Proportional to 2,645.92, 3,968.90 and 1,002.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.92 : 3,968.90 = 1,002.18 : x
2. Step 2: Convert to fraction form
   2,645.92/3,968.90 = 1,002.18/x
3. Step 3: Cross multiply
   2,645.92x = 3,968.90 × 1,002.18
4. Step 4: Simplify right side
   2,645.92x = 3,977,552.20
5. Step 5: Solve for x
   x = 3,977,552.20/2,645.92
6. Step 6: Final answer
   x = 1,503.28