Finding the Third Proportional to 371,979 and 810,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   371,979 : 810,388.50 = 810,388.50 : x
2. Step 2: Convert to fraction form
   371,979/810,388.50 = 810,388.50/x
3. Step 3: Cross multiply
   371,979x = 810,388.50 × 810,388.50
4. Step 4: Simplify right side
   371,979x = 656,729,520,932.25
5. Step 5: Solve for x
   x = 656,729,520,932.25/371,979
6. Step 6: Final answer
   x = 1,765,501.60