Finding the Fourth Proportional to 8,523.72, 12,786.54 and 2,678.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,523.72 : 12,786.54 = 2,678.76 : x
2. Step 2: Convert to fraction form
   8,523.72/12,786.54 = 2,678.76/x
3. Step 3: Cross multiply
   8,523.72x = 12,786.54 × 2,678.76
4. Step 4: Simplify right side
   8,523.72x = 34,252,071.89
5. Step 5: Solve for x
   x = 34,252,071.89/8,523.72
6. Step 6: Final answer
   x = 4,018.44