Finding the Third Proportional to 72,800 and 159,280

Step by Step Solution

1. Step 1: Write the proportion equation
   72,800 : 159,280 = 159,280 : x
2. Step 2: Convert to fraction form
   72,800/159,280 = 159,280/x
3. Step 3: Cross multiply
   72,800x = 159,280 × 159,280
4. Step 4: Simplify right side
   72,800x = 25,370,118,400
5. Step 5: Solve for x
   x = 25,370,118,400/72,800
6. Step 6: Final answer
   x = 348,490.64