Finding the Third Proportional to 429,012 and 641,250

Step by Step Solution

1. Step 1: Write the proportion equation
   429,012 : 641,250 = 641,250 : x
2. Step 2: Convert to fraction form
   429,012/641,250 = 641,250/x
3. Step 3: Cross multiply
   429,012x = 641,250 × 641,250
4. Step 4: Simplify right side
   429,012x = 411,201,562,500
5. Step 5: Solve for x
   x = 411,201,562,500/429,012
6. Step 6: Final answer
   x = 958,484.99