Finding the Third Proportional to 319,362 and 455,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   319,362 : 455,485.50 = 455,485.50 : x
2. Step 2: Convert to fraction form
   319,362/455,485.50 = 455,485.50/x
3. Step 3: Cross multiply
   319,362x = 455,485.50 × 455,485.50
4. Step 4: Simplify right side
   319,362x = 207,467,040,710.25
5. Step 5: Solve for x
   x = 207,467,040,710.25/319,362
6. Step 6: Final answer
   x = 649,629.70