Finding the Fourth Proportional to 1,424.16, 1,966.28 and 1,274.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.16 : 1,966.28 = 1,274.31 : x
2. Step 2: Convert to fraction form
   1,424.16/1,966.28 = 1,274.31/x
3. Step 3: Cross multiply
   1,424.16x = 1,966.28 × 1,274.31
4. Step 4: Simplify right side
   1,424.16x = 2,505,643.90
5. Step 5: Solve for x
   x = 2,505,643.90/1,424.16
6. Step 6: Final answer
   x = 1,759.38