Finding the Third Proportional to 320,916 and 695,344.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,916 : 695,344.50 = 695,344.50 : x
2. Step 2: Convert to fraction form
   320,916/695,344.50 = 695,344.50/x
3. Step 3: Cross multiply
   320,916x = 695,344.50 × 695,344.50
4. Step 4: Simplify right side
   320,916x = 483,503,973,680.25
5. Step 5: Solve for x
   x = 483,503,973,680.25/320,916
6. Step 6: Final answer
   x = 1,506,637.17