Finding the Fourth Proportional to 12,427.31, 18,641.55 and 3,662.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.31 : 18,641.55 = 3,662.30 : x
2. Step 2: Convert to fraction form
   12,427.31/18,641.55 = 3,662.30/x
3. Step 3: Cross multiply
   12,427.31x = 18,641.55 × 3,662.30
4. Step 4: Simplify right side
   12,427.31x = 68,270,948.57
5. Step 5: Solve for x
   x = 68,270,948.57/12,427.31
6. Step 6: Final answer
   x = 5,493.62