Finding the Fourth Proportional to 12,145.89, 18,219.07 and 3,826.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.89 : 18,219.07 = 3,826.18 : x
2. Step 2: Convert to fraction form
   12,145.89/18,219.07 = 3,826.18/x
3. Step 3: Cross multiply
   12,145.89x = 18,219.07 × 3,826.18
4. Step 4: Simplify right side
   12,145.89x = 69,709,441.25
5. Step 5: Solve for x
   x = 69,709,441.25/12,145.89
6. Step 6: Final answer
   x = 5,739.34