Finding the Third Proportional to 72,328 and 156,680

Step by Step Solution

1. Step 1: Write the proportion equation
   72,328 : 156,680 = 156,680 : x
2. Step 2: Convert to fraction form
   72,328/156,680 = 156,680/x
3. Step 3: Cross multiply
   72,328x = 156,680 × 156,680
4. Step 4: Simplify right side
   72,328x = 24,548,622,400
5. Step 5: Solve for x
   x = 24,548,622,400/72,328
6. Step 6: Final answer
   x = 339,406.90