Finding the Third Proportional to 209,477.25 and 455,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,477.25 : 455,404.50 = 455,404.50 : x
2. Step 2: Convert to fraction form
   209,477.25/455,404.50 = 455,404.50/x
3. Step 3: Cross multiply
   209,477.25x = 455,404.50 × 455,404.50
4. Step 4: Simplify right side
   209,477.25x = 207,393,258,620.25
5. Step 5: Solve for x
   x = 207,393,258,620.25/209,477.25
6. Step 6: Final answer
   x = 990,051.47