Finding the Third Proportional to 8,432 and 12,405

Step by Step Solution

1. Step 1: Write the proportion equation
   8,432 : 12,405 = 12,405 : x
2. Step 2: Convert to fraction form
   8,432/12,405 = 12,405/x
3. Step 3: Cross multiply
   8,432x = 12,405 × 12,405
4. Step 4: Simplify right side
   8,432x = 153,884,025
5. Step 5: Solve for x
   x = 153,884,025/8,432
6. Step 6: Final answer
   x = 18,250.00