Finding the Third Proportional to 408,607 and 630,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,607 : 630,142.50 = 630,142.50 : x
2. Step 2: Convert to fraction form
   408,607/630,142.50 = 630,142.50/x
3. Step 3: Cross multiply
   408,607x = 630,142.50 × 630,142.50
4. Step 4: Simplify right side
   408,607x = 397,079,570,306.25
5. Step 5: Solve for x
   x = 397,079,570,306.25/408,607
6. Step 6: Final answer
   x = 971,788.47