Finding the Fourth Proportional to 1,429.21, 2,144.46 and 909.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.21 : 2,144.46 = 909.07 : x
2. Step 2: Convert to fraction form
   1,429.21/2,144.46 = 909.07/x
3. Step 3: Cross multiply
   1,429.21x = 2,144.46 × 909.07
4. Step 4: Simplify right side
   1,429.21x = 1,949,469.25
5. Step 5: Solve for x
   x = 1,949,469.25/1,429.21
6. Step 6: Final answer
   x = 1,364.02