Finding the Fourth Proportional to 1,422.72, 2,133.33 and 448.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.72 : 2,133.33 = 448.56 : x
2. Step 2: Convert to fraction form
   1,422.72/2,133.33 = 448.56/x
3. Step 3: Cross multiply
   1,422.72x = 2,133.33 × 448.56
4. Step 4: Simplify right side
   1,422.72x = 956,926.50
5. Step 5: Solve for x
   x = 956,926.50/1,422.72
6. Step 6: Final answer
   x = 672.60