Finding the Fourth Proportional to 12,144.72, 18,219.64 and 3,827.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.72 : 18,219.64 = 3,827.10 : x
2. Step 2: Convert to fraction form
   12,144.72/18,219.64 = 3,827.10/x
3. Step 3: Cross multiply
   12,144.72x = 18,219.64 × 3,827.10
4. Step 4: Simplify right side
   12,144.72x = 69,728,384.24
5. Step 5: Solve for x
   x = 69,728,384.24/12,144.72
6. Step 6: Final answer
   x = 5,741.46