Finding the Third Proportional to 321,795 and 698,946.75

Step by Step Solution

1. Step 1: Write the proportion equation
   321,795 : 698,946.75 = 698,946.75 : x
2. Step 2: Convert to fraction form
   321,795/698,946.75 = 698,946.75/x
3. Step 3: Cross multiply
   321,795x = 698,946.75 × 698,946.75
4. Step 4: Simplify right side
   321,795x = 488,526,559,335.56
5. Step 5: Solve for x
   x = 488,526,559,335.56/321,795
6. Step 6: Final answer
   x = 1,518,129.74