Finding the Fourth Proportional to 1,422.55, 1,963.19 and 1,072.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.55 : 1,963.19 = 1,072.63 : x
2. Step 2: Convert to fraction form
   1,422.55/1,963.19 = 1,072.63/x
3. Step 3: Cross multiply
   1,422.55x = 1,963.19 × 1,072.63
4. Step 4: Simplify right side
   1,422.55x = 2,105,761.31
5. Step 5: Solve for x
   x = 2,105,761.31/1,422.55
6. Step 6: Final answer
   x = 1,480.28