Finding the Fourth Proportional to 1,422.47, 1,961.53 and 1,123.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.47 : 1,961.53 = 1,123.22 : x
2. Step 2: Convert to fraction form
   1,422.47/1,961.53 = 1,123.22/x
3. Step 3: Cross multiply
   1,422.47x = 1,961.53 × 1,123.22
4. Step 4: Simplify right side
   1,422.47x = 2,203,231.82
5. Step 5: Solve for x
   x = 2,203,231.82/1,422.47
6. Step 6: Final answer
   x = 1,548.87