Finding the Fourth Proportional to 12,213.98, 18,320.56 and 3,894.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,213.98 : 18,320.56 = 3,894.46 : x
2. Step 2: Convert to fraction form
   12,213.98/18,320.56 = 3,894.46/x
3. Step 3: Cross multiply
   12,213.98x = 18,320.56 × 3,894.46
4. Step 4: Simplify right side
   12,213.98x = 71,348,688.10
5. Step 5: Solve for x
   x = 71,348,688.10/12,213.98
6. Step 6: Final answer
   x = 5,841.56