Finding the Third Proportional to 325,118 and 698,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   325,118 : 698,172.50 = 698,172.50 : x
2. Step 2: Convert to fraction form
   325,118/698,172.50 = 698,172.50/x
3. Step 3: Cross multiply
   325,118x = 698,172.50 × 698,172.50
4. Step 4: Simplify right side
   325,118x = 487,444,839,756.25
5. Step 5: Solve for x
   x = 487,444,839,756.25/325,118
6. Step 6: Final answer
   x = 1,499,285.92