Finding the Fourth Proportional to 2,011.62, 2,775.33 and 1,311.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.62 : 2,775.33 = 1,311.78 : x
2. Step 2: Convert to fraction form
   2,011.62/2,775.33 = 1,311.78/x
3. Step 3: Cross multiply
   2,011.62x = 2,775.33 × 1,311.78
4. Step 4: Simplify right side
   2,011.62x = 3,640,622.39
5. Step 5: Solve for x
   x = 3,640,622.39/2,011.62
6. Step 6: Final answer
   x = 1,809.80