Finding the Third Proportional to 428,870.50 and 630,830

Step by Step Solution

1. Step 1: Write the proportion equation
   428,870.50 : 630,830 = 630,830 : x
2. Step 2: Convert to fraction form
   428,870.50/630,830 = 630,830/x
3. Step 3: Cross multiply
   428,870.50x = 630,830 × 630,830
4. Step 4: Simplify right side
   428,870.50x = 397,946,488,900
5. Step 5: Solve for x
   x = 397,946,488,900/428,870.50
6. Step 6: Final answer
   x = 927,894.29