Finding the Fourth Proportional to 12,209.10, 18,316.41 and 3,889.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.10 : 18,316.41 = 3,889.59 : x
2. Step 2: Convert to fraction form
   12,209.10/18,316.41 = 3,889.59/x
3. Step 3: Cross multiply
   12,209.10x = 18,316.41 × 3,889.59
4. Step 4: Simplify right side
   12,209.10x = 71,243,241.90
5. Step 5: Solve for x
   x = 71,243,241.90/12,209.10
6. Step 6: Final answer
   x = 5,835.26