Finding the Third Proportional to 12,415.78 and 16,789.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,415.78 : 16,789.78 = 16,789.78 : x
2. Step 2: Convert to fraction form
   12,415.78/16,789.78 = 16,789.78/x
3. Step 3: Cross multiply
   12,415.78x = 16,789.78 × 16,789.78
4. Step 4: Simplify right side
   12,415.78x = 281,896,754.42
5. Step 5: Solve for x
   x = 281,896,754.42/12,415.78
6. Step 6: Final answer
   x = 22,704.71