Finding the Fourth Proportional to 2,644.86, 3,967.34 and 1,002.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.86 : 3,967.34 = 1,002.18 : x
2. Step 2: Convert to fraction form
   2,644.86/3,967.34 = 1,002.18/x
3. Step 3: Cross multiply
   2,644.86x = 3,967.34 × 1,002.18
4. Step 4: Simplify right side
   2,644.86x = 3,975,988.80
5. Step 5: Solve for x
   x = 3,975,988.80/2,644.86
6. Step 6: Final answer
   x = 1,503.29