Finding the Fourth Proportional to 2,007.20, 3,005.12 and 1,274.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.20 : 3,005.12 = 1,274.96 : x
2. Step 2: Convert to fraction form
   2,007.20/3,005.12 = 1,274.96/x
3. Step 3: Cross multiply
   2,007.20x = 3,005.12 × 1,274.96
4. Step 4: Simplify right side
   2,007.20x = 3,831,407.80
5. Step 5: Solve for x
   x = 3,831,407.80/2,007.20
6. Step 6: Final answer
   x = 1,908.83