Finding the Third Proportional to 220,709 and 341,680

Step by Step Solution

1. Step 1: Write the proportion equation
   220,709 : 341,680 = 341,680 : x
2. Step 2: Convert to fraction form
   220,709/341,680 = 341,680/x
3. Step 3: Cross multiply
   220,709x = 341,680 × 341,680
4. Step 4: Simplify right side
   220,709x = 116,745,222,400
5. Step 5: Solve for x
   x = 116,745,222,400/220,709
6. Step 6: Final answer
   x = 528,955.42