Finding the Fourth Proportional to 1,424.20, 1,963.98 and 969.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.20 : 1,963.98 = 969.16 : x
2. Step 2: Convert to fraction form
   1,424.20/1,963.98 = 969.16/x
3. Step 3: Cross multiply
   1,424.20x = 1,963.98 × 969.16
4. Step 4: Simplify right side
   1,424.20x = 1,903,410.86
5. Step 5: Solve for x
   x = 1,903,410.86/1,424.20
6. Step 6: Final answer
   x = 1,336.48