Finding the Fourth Proportional to 12,843, 17,713.62 and 8,870.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,843 : 17,713.62 = 8,870.76 : x
2. Step 2: Convert to fraction form
   12,843/17,713.62 = 8,870.76/x
3. Step 3: Cross multiply
   12,843x = 17,713.62 × 8,870.76
4. Step 4: Simplify right side
   12,843x = 157,133,271.75
5. Step 5: Solve for x
   x = 157,133,271.75/12,843
6. Step 6: Final answer
   x = 12,234.94