Finding the Fourth Proportional to 2,646.66, 3,967.59 and 1,002.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.66 : 3,967.59 = 1,002.78 : x
2. Step 2: Convert to fraction form
   2,646.66/3,967.59 = 1,002.78/x
3. Step 3: Cross multiply
   2,646.66x = 3,967.59 × 1,002.78
4. Step 4: Simplify right side
   2,646.66x = 3,978,619.90
5. Step 5: Solve for x
   x = 3,978,619.90/2,646.66
6. Step 6: Final answer
   x = 1,503.26