Finding the Third Proportional to 78,564 and 169,680

Step by Step Solution

1. Step 1: Write the proportion equation
   78,564 : 169,680 = 169,680 : x
2. Step 2: Convert to fraction form
   78,564/169,680 = 169,680/x
3. Step 3: Cross multiply
   78,564x = 169,680 × 169,680
4. Step 4: Simplify right side
   78,564x = 28,791,302,400
5. Step 5: Solve for x
   x = 28,791,302,400/78,564
6. Step 6: Final answer
   x = 366,469.41