Finding the Third Proportional to 68,405 and 109,280

Step by Step Solution

1. Step 1: Write the proportion equation
   68,405 : 109,280 = 109,280 : x
2. Step 2: Convert to fraction form
   68,405/109,280 = 109,280/x
3. Step 3: Cross multiply
   68,405x = 109,280 × 109,280
4. Step 4: Simplify right side
   68,405x = 11,942,118,400
5. Step 5: Solve for x
   x = 11,942,118,400/68,405
6. Step 6: Final answer
   x = 174,579.61