Finding the Third Proportional to 407,185.50 and 877,482.50

Step by Step Solution

1. Step 1: Write the proportion equation
   407,185.50 : 877,482.50 = 877,482.50 : x
2. Step 2: Convert to fraction form
   407,185.50/877,482.50 = 877,482.50/x
3. Step 3: Cross multiply
   407,185.50x = 877,482.50 × 877,482.50
4. Step 4: Simplify right side
   407,185.50x = 769,975,537,806.25
5. Step 5: Solve for x
   x = 769,975,537,806.25/407,185.50
6. Step 6: Final answer
   x = 1,890,969.93