Finding the Third Proportional to 403,409.25 and 877,792.50

Step by Step Solution

1. Step 1: Write the proportion equation
   403,409.25 : 877,792.50 = 877,792.50 : x
2. Step 2: Convert to fraction form
   403,409.25/877,792.50 = 877,792.50/x
3. Step 3: Cross multiply
   403,409.25x = 877,792.50 × 877,792.50
4. Step 4: Simplify right side
   403,409.25x = 770,519,673,056.25
5. Step 5: Solve for x
   x = 770,519,673,056.25/403,409.25
6. Step 6: Final answer
   x = 1,910,019.84