Finding the Fourth Proportional to 2,145.53, 2,960.78 and 1,214.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.53 : 2,960.78 = 1,214.03 : x
2. Step 2: Convert to fraction form
   2,145.53/2,960.78 = 1,214.03/x
3. Step 3: Cross multiply
   2,145.53x = 2,960.78 × 1,214.03
4. Step 4: Simplify right side
   2,145.53x = 3,594,454.87
5. Step 5: Solve for x
   x = 3,594,454.87/2,145.53
6. Step 6: Final answer
   x = 1,675.33