Finding the Fourth Proportional to 1,229.31, 1,842.59 and 448.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.31 : 1,842.59 = 448.67 : x
2. Step 2: Convert to fraction form
   1,229.31/1,842.59 = 448.67/x
3. Step 3: Cross multiply
   1,229.31x = 1,842.59 × 448.67
4. Step 4: Simplify right side
   1,229.31x = 826,714.86
5. Step 5: Solve for x
   x = 826,714.86/1,229.31
6. Step 6: Final answer
   x = 672.50