Finding the Third Proportional to 454,978 and 713,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   454,978 : 713,661.50 = 713,661.50 : x
2. Step 2: Convert to fraction form
   454,978/713,661.50 = 713,661.50/x
3. Step 3: Cross multiply
   454,978x = 713,661.50 × 713,661.50
4. Step 4: Simplify right side
   454,978x = 509,312,736,582.25
5. Step 5: Solve for x
   x = 509,312,736,582.25/454,978
6. Step 6: Final answer
   x = 1,119,422.78