Finding the Third Proportional to 428,773.50 and 630,315

Step by Step Solution

1. Step 1: Write the proportion equation
   428,773.50 : 630,315 = 630,315 : x
2. Step 2: Convert to fraction form
   428,773.50/630,315 = 630,315/x
3. Step 3: Cross multiply
   428,773.50x = 630,315 × 630,315
4. Step 4: Simplify right side
   428,773.50x = 397,296,999,225
5. Step 5: Solve for x
   x = 397,296,999,225/428,773.50
6. Step 6: Final answer
   x = 926,589.44