Finding the Third Proportional to 155,533.50 and 320,880

Step by Step Solution

1. Step 1: Write the proportion equation
   155,533.50 : 320,880 = 320,880 : x
2. Step 2: Convert to fraction form
   155,533.50/320,880 = 320,880/x
3. Step 3: Cross multiply
   155,533.50x = 320,880 × 320,880
4. Step 4: Simplify right side
   155,533.50x = 102,963,974,400
5. Step 5: Solve for x
   x = 102,963,974,400/155,533.50
6. Step 6: Final answer
   x = 662,005.13