Finding the Fourth Proportional to 12,147.30, 18,219.42 and 3,382.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,147.30 : 18,219.42 = 3,382.89 : x
2. Step 2: Convert to fraction form
   12,147.30/18,219.42 = 3,382.89/x
3. Step 3: Cross multiply
   12,147.30x = 18,219.42 × 3,382.89
4. Step 4: Simplify right side
   12,147.30x = 61,634,293.72
5. Step 5: Solve for x
   x = 61,634,293.72/12,147.30
6. Step 6: Final answer
   x = 5,073.91