Finding the Fourth Proportional to 2,150.66, 2,967.36 and 1,311.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.66 : 2,967.36 = 1,311.31 : x
2. Step 2: Convert to fraction form
   2,150.66/2,967.36 = 1,311.31/x
3. Step 3: Cross multiply
   2,150.66x = 2,967.36 × 1,311.31
4. Step 4: Simplify right side
   2,150.66x = 3,891,128.84
5. Step 5: Solve for x
   x = 3,891,128.84/2,150.66
6. Step 6: Final answer
   x = 1,809.27