Finding the Fourth Proportional to 2,142.32, 3,212.06 and 909.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.32 : 3,212.06 = 909.41 : x
2. Step 2: Convert to fraction form
   2,142.32/3,212.06 = 909.41/x
3. Step 3: Cross multiply
   2,142.32x = 3,212.06 × 909.41
4. Step 4: Simplify right side
   2,142.32x = 2,921,058.88
5. Step 5: Solve for x
   x = 2,921,058.88/2,142.32
6. Step 6: Final answer
   x = 1,363.51