Finding the Fourth Proportional to 2,641.34, 3,962.37 and 909.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.34 : 3,962.37 = 909.50 : x
2. Step 2: Convert to fraction form
   2,641.34/3,962.37 = 909.50/x
3. Step 3: Cross multiply
   2,641.34x = 3,962.37 × 909.50
4. Step 4: Simplify right side
   2,641.34x = 3,603,775.52
5. Step 5: Solve for x
   x = 3,603,775.52/2,641.34
6. Step 6: Final answer
   x = 1,364.37