Finding the Fourth Proportional to 2,003.40, 3,003.30 and 1,272.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.40 : 3,003.30 = 1,272.60 : x
2. Step 2: Convert to fraction form
   2,003.40/3,003.30 = 1,272.60/x
3. Step 3: Cross multiply
   2,003.40x = 3,003.30 × 1,272.60
4. Step 4: Simplify right side
   2,003.40x = 3,821,999.58
5. Step 5: Solve for x
   x = 3,821,999.58/2,003.40
6. Step 6: Final answer
   x = 1,907.76