Finding the Fourth Proportional to 2,150.31, 2,967.48 and 1,218.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.31 : 2,967.48 = 1,218.81 : x
2. Step 2: Convert to fraction form
   2,150.31/2,967.48 = 1,218.81/x
3. Step 3: Cross multiply
   2,150.31x = 2,967.48 × 1,218.81
4. Step 4: Simplify right side
   2,150.31x = 3,616,797.15
5. Step 5: Solve for x
   x = 3,616,797.15/2,150.31
6. Step 6: Final answer
   x = 1,681.99