Finding the Third Proportional to 398,253 and 630,922.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,253 : 630,922.50 = 630,922.50 : x
2. Step 2: Convert to fraction form
   398,253/630,922.50 = 630,922.50/x
3. Step 3: Cross multiply
   398,253x = 630,922.50 × 630,922.50
4. Step 4: Simplify right side
   398,253x = 398,063,201,006.25
5. Step 5: Solve for x
   x = 398,063,201,006.25/398,253
6. Step 6: Final answer
   x = 999,523.42