Finding the Fourth Proportional to 2,003.02, 3,005.43 and 1,272.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.02 : 3,005.43 = 1,272.40 : x
2. Step 2: Convert to fraction form
   2,003.02/3,005.43 = 1,272.40/x
3. Step 3: Cross multiply
   2,003.02x = 3,005.43 × 1,272.40
4. Step 4: Simplify right side
   2,003.02x = 3,824,109.13
5. Step 5: Solve for x
   x = 3,824,109.13/2,003.02
6. Step 6: Final answer
   x = 1,909.17