Finding the Third Proportional to 455,992.50 and 681,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,992.50 : 681,436.50 = 681,436.50 : x
2. Step 2: Convert to fraction form
   455,992.50/681,436.50 = 681,436.50/x
3. Step 3: Cross multiply
   455,992.50x = 681,436.50 × 681,436.50
4. Step 4: Simplify right side
   455,992.50x = 464,355,703,532.25
5. Step 5: Solve for x
   x = 464,355,703,532.25/455,992.50
6. Step 6: Final answer
   x = 1,018,340.66