Finding the Third Proportional to 216,978 and 444,523.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,978 : 444,523.50 = 444,523.50 : x
2. Step 2: Convert to fraction form
   216,978/444,523.50 = 444,523.50/x
3. Step 3: Cross multiply
   216,978x = 444,523.50 × 444,523.50
4. Step 4: Simplify right side
   216,978x = 197,601,142,052.25
5. Step 5: Solve for x
   x = 197,601,142,052.25/216,978
6. Step 6: Final answer
   x = 910,696.67