Finding the Third Proportional to 319,602 and 699,337.50

Step by Step Solution

1. Step 1: Write the proportion equation
   319,602 : 699,337.50 = 699,337.50 : x
2. Step 2: Convert to fraction form
   319,602/699,337.50 = 699,337.50/x
3. Step 3: Cross multiply
   319,602x = 699,337.50 × 699,337.50
4. Step 4: Simplify right side
   319,602x = 489,072,938,906.25
5. Step 5: Solve for x
   x = 489,072,938,906.25/319,602
6. Step 6: Final answer
   x = 1,530,256.19