Finding the Fourth Proportional to 1,434.56, 1,978.48 and 1,214

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.56 : 1,978.48 = 1,214 : x
2. Step 2: Convert to fraction form
   1,434.56/1,978.48 = 1,214/x
3. Step 3: Cross multiply
   1,434.56x = 1,978.48 × 1,214
4. Step 4: Simplify right side
   1,434.56x = 2,401,874.72
5. Step 5: Solve for x
   x = 2,401,874.72/1,434.56
6. Step 6: Final answer
   x = 1,674.29