Finding the Fourth Proportional to 8,621.14, 12,931.79 and 2,381.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,621.14 : 12,931.79 = 2,381.50 : x
2. Step 2: Convert to fraction form
   8,621.14/12,931.79 = 2,381.50/x
3. Step 3: Cross multiply
   8,621.14x = 12,931.79 × 2,381.50
4. Step 4: Simplify right side
   8,621.14x = 30,797,057.89
5. Step 5: Solve for x
   x = 30,797,057.89/8,621.14
6. Step 6: Final answer
   x = 3,572.27