Finding the Fourth Proportional to 2,146.28, 2,961.84 and 1,214.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.28 : 2,961.84 = 1,214.72 : x
2. Step 2: Convert to fraction form
   2,146.28/2,961.84 = 1,214.72/x
3. Step 3: Cross multiply
   2,146.28x = 2,961.84 × 1,214.72
4. Step 4: Simplify right side
   2,146.28x = 3,597,806.28
5. Step 5: Solve for x
   x = 3,597,806.28/2,146.28
6. Step 6: Final answer
   x = 1,676.30