Finding the Fourth Proportional to 12,236.24, 18,355.69 and 3,914.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,236.24 : 18,355.69 = 3,914.30 : x
2. Step 2: Convert to fraction form
   12,236.24/18,355.69 = 3,914.30/x
3. Step 3: Cross multiply
   12,236.24x = 18,355.69 × 3,914.30
4. Step 4: Simplify right side
   12,236.24x = 71,849,659.32
5. Step 5: Solve for x
   x = 71,849,659.32/12,236.24
6. Step 6: Final answer
   x = 5,871.87