Finding the Fourth Proportional to 2,009.76, 2,774.03 and 1,311

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.76 : 2,774.03 = 1,311 : x
2. Step 2: Convert to fraction form
   2,009.76/2,774.03 = 1,311/x
3. Step 3: Cross multiply
   2,009.76x = 2,774.03 × 1,311
4. Step 4: Simplify right side
   2,009.76x = 3,636,746.78
5. Step 5: Solve for x
   x = 3,636,746.78/2,009.76
6. Step 6: Final answer
   x = 1,809.54