Finding the Fourth Proportional to 1,428.54, 2,142.69 and 969.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.54 : 2,142.69 = 969.27 : x
2. Step 2: Convert to fraction form
   1,428.54/2,142.69 = 969.27/x
3. Step 3: Cross multiply
   1,428.54x = 2,142.69 × 969.27
4. Step 4: Simplify right side
   1,428.54x = 2,076,845.14
5. Step 5: Solve for x
   x = 2,076,845.14/1,428.54
6. Step 6: Final answer
   x = 1,453.82