Finding the Third Proportional to 429,139 and 630,570

Step by Step Solution

1. Step 1: Write the proportion equation
   429,139 : 630,570 = 630,570 : x
2. Step 2: Convert to fraction form
   429,139/630,570 = 630,570/x
3. Step 3: Cross multiply
   429,139x = 630,570 × 630,570
4. Step 4: Simplify right side
   429,139x = 397,618,524,900
5. Step 5: Solve for x
   x = 397,618,524,900/429,139
6. Step 6: Final answer
   x = 926,549.50