Finding the Fourth Proportional to 12,144.54, 18,215.29 and 3,380.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.54 : 18,215.29 = 3,380.14 : x
2. Step 2: Convert to fraction form
   12,144.54/18,215.29 = 3,380.14/x
3. Step 3: Cross multiply
   12,144.54x = 18,215.29 × 3,380.14
4. Step 4: Simplify right side
   12,144.54x = 61,570,230.34
5. Step 5: Solve for x
   x = 61,570,230.34/12,144.54
6. Step 6: Final answer
   x = 5,069.79