Finding the Fourth Proportional to 8,180.50, 12,258.60 and 5,256.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,180.50 : 12,258.60 = 5,256.40 : x
2. Step 2: Convert to fraction form
   8,180.50/12,258.60 = 5,256.40/x
3. Step 3: Cross multiply
   8,180.50x = 12,258.60 × 5,256.40
4. Step 4: Simplify right side
   8,180.50x = 64,436,105.04
5. Step 5: Solve for x
   x = 64,436,105.04/8,180.50
6. Step 6: Final answer
   x = 7,876.79