Finding the Fourth Proportional to 8,956.06, 12,359.62 and 5,178.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,956.06 : 12,359.62 = 5,178.86 : x
2. Step 2: Convert to fraction form
   8,956.06/12,359.62 = 5,178.86/x
3. Step 3: Cross multiply
   8,956.06x = 12,359.62 × 5,178.86
4. Step 4: Simplify right side
   8,956.06x = 64,008,749.87
5. Step 5: Solve for x
   x = 64,008,749.87/8,956.06
6. Step 6: Final answer
   x = 7,146.98