Finding the Third Proportional to 454,969.50 and 688,719

Step by Step Solution

1. Step 1: Write the proportion equation
   454,969.50 : 688,719 = 688,719 : x
2. Step 2: Convert to fraction form
   454,969.50/688,719 = 688,719/x
3. Step 3: Cross multiply
   454,969.50x = 688,719 × 688,719
4. Step 4: Simplify right side
   454,969.50x = 474,333,860,961
5. Step 5: Solve for x
   x = 474,333,860,961/454,969.50
6. Step 6: Final answer
   x = 1,042,561.89