Finding the Third Proportional to 301,338 and 455,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   301,338 : 455,890.50 = 455,890.50 : x
2. Step 2: Convert to fraction form
   301,338/455,890.50 = 455,890.50/x
3. Step 3: Cross multiply
   301,338x = 455,890.50 × 455,890.50
4. Step 4: Simplify right side
   301,338x = 207,836,147,990.25
5. Step 5: Solve for x
   x = 207,836,147,990.25/301,338
6. Step 6: Final answer
   x = 689,711.05