Finding the Fourth Proportional to 12,145.82, 18,218.16 and 3,380.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.82 : 18,218.16 = 3,380.54 : x
2. Step 2: Convert to fraction form
   12,145.82/18,218.16 = 3,380.54/x
3. Step 3: Cross multiply
   12,145.82x = 18,218.16 × 3,380.54
4. Step 4: Simplify right side
   12,145.82x = 61,587,127.52
5. Step 5: Solve for x
   x = 61,587,127.52/12,145.82
6. Step 6: Final answer
   x = 5,070.65