Finding the Fourth Proportional to 2,144.63, 3,213.50 and 909.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.63 : 3,213.50 = 909.18 : x
2. Step 2: Convert to fraction form
   2,144.63/3,213.50 = 909.18/x
3. Step 3: Cross multiply
   2,144.63x = 3,213.50 × 909.18
4. Step 4: Simplify right side
   2,144.63x = 2,921,645.38
5. Step 5: Solve for x
   x = 2,921,645.38/2,144.63
6. Step 6: Final answer
   x = 1,362.31