Finding the Fourth Proportional to 2,150.40, 2,967.50 and 1,218.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.40 : 2,967.50 = 1,218.90 : x
2. Step 2: Convert to fraction form
   2,150.40/2,967.50 = 1,218.90/x
3. Step 3: Cross multiply
   2,150.40x = 2,967.50 × 1,218.90
4. Step 4: Simplify right side
   2,150.40x = 3,617,085.75
5. Step 5: Solve for x
   x = 3,617,085.75/2,150.40
6. Step 6: Final answer
   x = 1,682.05