Finding the Fourth Proportional to 8,956.89, 12,360.69 and 5,180.13

Step by Step Solution

1. Step 1: Write the proportion equation
   8,956.89 : 12,360.69 = 5,180.13 : x
2. Step 2: Convert to fraction form
   8,956.89/12,360.69 = 5,180.13/x
3. Step 3: Cross multiply
   8,956.89x = 12,360.69 × 5,180.13
4. Step 4: Simplify right side
   8,956.89x = 64,029,981.09
5. Step 5: Solve for x
   x = 64,029,981.09/8,956.89
6. Step 6: Final answer
   x = 7,148.68