Finding the Fourth Proportional to 1,446.72, 2,169.03 and 830.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.72 : 2,169.03 = 830.31 : x
2. Step 2: Convert to fraction form
   1,446.72/2,169.03 = 830.31/x
3. Step 3: Cross multiply
   1,446.72x = 2,169.03 × 830.31
4. Step 4: Simplify right side
   1,446.72x = 1,800,967.30
5. Step 5: Solve for x
   x = 1,800,967.30/1,446.72
6. Step 6: Final answer
   x = 1,244.86