Finding the Third Proportional to 129,766.50 and 279,513

Step by Step Solution

1. Step 1: Write the proportion equation
   129,766.50 : 279,513 = 279,513 : x
2. Step 2: Convert to fraction form
   129,766.50/279,513 = 279,513/x
3. Step 3: Cross multiply
   129,766.50x = 279,513 × 279,513
4. Step 4: Simplify right side
   129,766.50x = 78,127,517,169
5. Step 5: Solve for x
   x = 78,127,517,169/129,766.50
6. Step 6: Final answer
   x = 602,062.30