Finding the Third Proportional to 155,971 and 319,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,971 : 319,317.50 = 319,317.50 : x
2. Step 2: Convert to fraction form
   155,971/319,317.50 = 319,317.50/x
3. Step 3: Cross multiply
   155,971x = 319,317.50 × 319,317.50
4. Step 4: Simplify right side
   155,971x = 101,963,665,806.25
5. Step 5: Solve for x
   x = 101,963,665,806.25/155,971
6. Step 6: Final answer
   x = 653,734.77