Finding the Third Proportional to 153,865.50 and 323,280

Step by Step Solution

1. Step 1: Write the proportion equation
   153,865.50 : 323,280 = 323,280 : x
2. Step 2: Convert to fraction form
   153,865.50/323,280 = 323,280/x
3. Step 3: Cross multiply
   153,865.50x = 323,280 × 323,280
4. Step 4: Simplify right side
   153,865.50x = 104,509,958,400
5. Step 5: Solve for x
   x = 104,509,958,400/153,865.50
6. Step 6: Final answer
   x = 679,229.32