Finding the Third Proportional to 286,707 and 455,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,707 : 455,404.50 = 455,404.50 : x
2. Step 2: Convert to fraction form
   286,707/455,404.50 = 455,404.50/x
3. Step 3: Cross multiply
   286,707x = 455,404.50 × 455,404.50
4. Step 4: Simplify right side
   286,707x = 207,393,258,620.25
5. Step 5: Solve for x
   x = 207,393,258,620.25/286,707
6. Step 6: Final answer
   x = 723,363.08