Finding the Fourth Proportional to 1,422.42, 2,133.82 and 448.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.42 : 2,133.82 = 448.18 : x
2. Step 2: Convert to fraction form
   1,422.42/2,133.82 = 448.18/x
3. Step 3: Cross multiply
   1,422.42x = 2,133.82 × 448.18
4. Step 4: Simplify right side
   1,422.42x = 956,335.45
5. Step 5: Solve for x
   x = 956,335.45/1,422.42
6. Step 6: Final answer
   x = 672.33