Finding the Third Proportional to 72,900 and 157,280

Step by Step Solution

1. Step 1: Write the proportion equation
   72,900 : 157,280 = 157,280 : x
2. Step 2: Convert to fraction form
   72,900/157,280 = 157,280/x
3. Step 3: Cross multiply
   72,900x = 157,280 × 157,280
4. Step 4: Simplify right side
   72,900x = 24,736,998,400
5. Step 5: Solve for x
   x = 24,736,998,400/72,900
6. Step 6: Final answer
   x = 339,327.82