Finding the Third Proportional to 326,718 and 693,090

Step by Step Solution

1. Step 1: Write the proportion equation
   326,718 : 693,090 = 693,090 : x
2. Step 2: Convert to fraction form
   326,718/693,090 = 693,090/x
3. Step 3: Cross multiply
   326,718x = 693,090 × 693,090
4. Step 4: Simplify right side
   326,718x = 480,373,748,100
5. Step 5: Solve for x
   x = 480,373,748,100/326,718
6. Step 6: Final answer
   x = 1,470,300.83