Finding the Fourth Proportional to 2,007.70, 3,005.49 and 1,276.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.70 : 3,005.49 = 1,276.30 : x
2. Step 2: Convert to fraction form
   2,007.70/3,005.49 = 1,276.30/x
3. Step 3: Cross multiply
   2,007.70x = 3,005.49 × 1,276.30
4. Step 4: Simplify right side
   2,007.70x = 3,835,906.89
5. Step 5: Solve for x
   x = 3,835,906.89/2,007.70
6. Step 6: Final answer
   x = 1,910.60