Finding the Fourth Proportional to 12,258.89, 18,389.00 and 3,938.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,258.89 : 18,389.00 = 3,938.26 : x
2. Step 2: Convert to fraction form
   12,258.89/18,389.00 = 3,938.26/x
3. Step 3: Cross multiply
   12,258.89x = 18,389.00 × 3,938.26
4. Step 4: Simplify right side
   12,258.89x = 72,420,627.01
5. Step 5: Solve for x
   x = 72,420,627.01/12,258.89
6. Step 6: Final answer
   x = 5,907.60