Finding the Fourth Proportional to 12,243.50, 18,365.20 and 3,478.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,243.50 : 18,365.20 = 3,478.42 : x
2. Step 2: Convert to fraction form
   12,243.50/18,365.20 = 3,478.42/x
3. Step 3: Cross multiply
   12,243.50x = 18,365.20 × 3,478.42
4. Step 4: Simplify right side
   12,243.50x = 63,881,878.98
5. Step 5: Solve for x
   x = 63,881,878.98/12,243.50
6. Step 6: Final answer
   x = 5,217.62