Finding the Fourth Proportional to 1,442.80, 2,149.56 and 1,422.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.80 : 2,149.56 = 1,422.72 : x
2. Step 2: Convert to fraction form
   1,442.80/2,149.56 = 1,422.72/x
3. Step 3: Cross multiply
   1,442.80x = 2,149.56 × 1,422.72
4. Step 4: Simplify right side
   1,442.80x = 3,058,222.00
5. Step 5: Solve for x
   x = 3,058,222.00/1,442.80
6. Step 6: Final answer
   x = 2,119.64