Finding the Third Proportional to 12,870 and 19,245

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870 : 19,245 = 19,245 : x
2. Step 2: Convert to fraction form
   12,870/19,245 = 19,245/x
3. Step 3: Cross multiply
   12,870x = 19,245 × 19,245
4. Step 4: Simplify right side
   12,870x = 370,370,025
5. Step 5: Solve for x
   x = 370,370,025/12,870
6. Step 6: Final answer
   x = 28,777.78