Finding the Third Proportional to 371,631 and 548,698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   371,631 : 548,698.50 = 548,698.50 : x
2. Step 2: Convert to fraction form
   371,631/548,698.50 = 548,698.50/x
3. Step 3: Cross multiply
   371,631x = 548,698.50 × 548,698.50
4. Step 4: Simplify right side
   371,631x = 301,070,043,902.25
5. Step 5: Solve for x
   x = 301,070,043,902.25/371,631
6. Step 6: Final answer
   x = 810,131.67