Finding the Third Proportional to 485,975.50 and 684,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   485,975.50 : 684,061.50 = 684,061.50 : x
2. Step 2: Convert to fraction form
   485,975.50/684,061.50 = 684,061.50/x
3. Step 3: Cross multiply
   485,975.50x = 684,061.50 × 684,061.50
4. Step 4: Simplify right side
   485,975.50x = 467,940,135,782.25
5. Step 5: Solve for x
   x = 467,940,135,782.25/485,975.50
6. Step 6: Final answer
   x = 962,888.33