Finding the Third Proportional to 406,230 and 628,668.75

Step by Step Solution

1. Step 1: Write the proportion equation
   406,230 : 628,668.75 = 628,668.75 : x
2. Step 2: Convert to fraction form
   406,230/628,668.75 = 628,668.75/x
3. Step 3: Cross multiply
   406,230x = 628,668.75 × 628,668.75
4. Step 4: Simplify right side
   406,230x = 395,224,397,226.56
5. Step 5: Solve for x
   x = 395,224,397,226.56/406,230
6. Step 6: Final answer
   x = 972,907.95