Finding the Fourth Proportional to 43,315.12, 64,976.37 and 12,150.37

Step by Step Solution

1. Step 1: Write the proportion equation
   43,315.12 : 64,976.37 = 12,150.37 : x
2. Step 2: Convert to fraction form
   43,315.12/64,976.37 = 12,150.37/x
3. Step 3: Cross multiply
   43,315.12x = 64,976.37 × 12,150.37
4. Step 4: Simplify right side
   43,315.12x = 789,486,936.76
5. Step 5: Solve for x
   x = 789,486,936.76/43,315.12
6. Step 6: Final answer
   x = 18,226.59