Finding the Third Proportional to 457,818 and 697,378.50

Step by Step Solution

1. Step 1: Write the proportion equation
   457,818 : 697,378.50 = 697,378.50 : x
2. Step 2: Convert to fraction form
   457,818/697,378.50 = 697,378.50/x
3. Step 3: Cross multiply
   457,818x = 697,378.50 × 697,378.50
4. Step 4: Simplify right side
   457,818x = 486,336,772,262.25
5. Step 5: Solve for x
   x = 486,336,772,262.25/457,818
6. Step 6: Final answer
   x = 1,062,292.82