Finding the Third Proportional to 429,216.75 and 664,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   429,216.75 : 664,300.50 = 664,300.50 : x
2. Step 2: Convert to fraction form
   429,216.75/664,300.50 = 664,300.50/x
3. Step 3: Cross multiply
   429,216.75x = 664,300.50 × 664,300.50
4. Step 4: Simplify right side
   429,216.75x = 441,295,154,300.25
5. Step 5: Solve for x
   x = 441,295,154,300.25/429,216.75
6. Step 6: Final answer
   x = 1,028,140.57