Finding the Fourth Proportional to 1,429.72, 2,141.56 and 909.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.72 : 2,141.56 = 909.44 : x
2. Step 2: Convert to fraction form
   1,429.72/2,141.56 = 909.44/x
3. Step 3: Cross multiply
   1,429.72x = 2,141.56 × 909.44
4. Step 4: Simplify right side
   1,429.72x = 1,947,620.33
5. Step 5: Solve for x
   x = 1,947,620.33/1,429.72
6. Step 6: Final answer
   x = 1,362.24