Finding the Third Proportional to 72,620 and 156,711

Step by Step Solution

1. Step 1: Write the proportion equation
   72,620 : 156,711 = 156,711 : x
2. Step 2: Convert to fraction form
   72,620/156,711 = 156,711/x
3. Step 3: Cross multiply
   72,620x = 156,711 × 156,711
4. Step 4: Simplify right side
   72,620x = 24,558,337,521
5. Step 5: Solve for x
   x = 24,558,337,521/72,620
6. Step 6: Final answer
   x = 338,175.95