Finding the Fourth Proportional to 12,243.25, 18,363.56 and 3,929.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,243.25 : 18,363.56 = 3,929.21 : x
2. Step 2: Convert to fraction form
   12,243.25/18,363.56 = 3,929.21/x
3. Step 3: Cross multiply
   12,243.25x = 18,363.56 × 3,929.21
4. Step 4: Simplify right side
   12,243.25x = 72,154,263.09
5. Step 5: Solve for x
   x = 72,154,263.09/12,243.25
6. Step 6: Final answer
   x = 5,893.39