Finding the Third Proportional to 155,969.50 and 319,328

Step by Step Solution

1. Step 1: Write the proportion equation
   155,969.50 : 319,328 = 319,328 : x
2. Step 2: Convert to fraction form
   155,969.50/319,328 = 319,328/x
3. Step 3: Cross multiply
   155,969.50x = 319,328 × 319,328
4. Step 4: Simplify right side
   155,969.50x = 101,970,371,584
5. Step 5: Solve for x
   x = 101,970,371,584/155,969.50
6. Step 6: Final answer
   x = 653,784.05