Finding the Third Proportional to 407,171.25 and 886,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   407,171.25 : 886,621.50 = 886,621.50 : x
2. Step 2: Convert to fraction form
   407,171.25/886,621.50 = 886,621.50/x
3. Step 3: Cross multiply
   407,171.25x = 886,621.50 × 886,621.50
4. Step 4: Simplify right side
   407,171.25x = 786,097,684,262.25
5. Step 5: Solve for x
   x = 786,097,684,262.25/407,171.25
6. Step 6: Final answer
   x = 1,930,631.61