Finding the Third Proportional to 428,817 and 630,364.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,817 : 630,364.50 = 630,364.50 : x
2. Step 2: Convert to fraction form
   428,817/630,364.50 = 630,364.50/x
3. Step 3: Cross multiply
   428,817x = 630,364.50 × 630,364.50
4. Step 4: Simplify right side
   428,817x = 397,359,402,860.25
5. Step 5: Solve for x
   x = 397,359,402,860.25/428,817
6. Step 6: Final answer
   x = 926,640.97