Finding the Fourth Proportional to 16,847.56, 23,240.82 and 12,861.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,847.56 : 23,240.82 = 12,861.76 : x
2. Step 2: Convert to fraction form
   16,847.56/23,240.82 = 12,861.76/x
3. Step 3: Cross multiply
   16,847.56x = 23,240.82 × 12,861.76
4. Step 4: Simplify right side
   16,847.56x = 298,917,849.04
5. Step 5: Solve for x
   x = 298,917,849.04/16,847.56
6. Step 6: Final answer
   x = 17,742.50