Finding the Third Proportional to 13,109 and 28,405

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109 : 28,405 = 28,405 : x
2. Step 2: Convert to fraction form
   13,109/28,405 = 28,405/x
3. Step 3: Cross multiply
   13,109x = 28,405 × 28,405
4. Step 4: Simplify right side
   13,109x = 806,844,025
5. Step 5: Solve for x
   x = 806,844,025/13,109
6. Step 6: Final answer
   x = 61,548.86