Finding the Third Proportional to 129,084.25 and 279,613

Step by Step Solution

1. Step 1: Write the proportion equation
   129,084.25 : 279,613 = 279,613 : x
2. Step 2: Convert to fraction form
   129,084.25/279,613 = 279,613/x
3. Step 3: Cross multiply
   129,084.25x = 279,613 × 279,613
4. Step 4: Simplify right side
   129,084.25x = 78,183,429,769
5. Step 5: Solve for x
   x = 78,183,429,769/129,084.25
6. Step 6: Final answer
   x = 605,677.53