Finding the Third Proportional to 485,613 and 761,780.25

Step by Step Solution

1. Step 1: Write the proportion equation
   485,613 : 761,780.25 = 761,780.25 : x
2. Step 2: Convert to fraction form
   485,613/761,780.25 = 761,780.25/x
3. Step 3: Cross multiply
   485,613x = 761,780.25 × 761,780.25
4. Step 4: Simplify right side
   485,613x = 580,309,149,290.06
5. Step 5: Solve for x
   x = 580,309,149,290.06/485,613
6. Step 6: Final answer
   x = 1,195,003.32