Finding the Third Proportional to 129,817.50 and 279,024

Step by Step Solution

1. Step 1: Write the proportion equation
   129,817.50 : 279,024 = 279,024 : x
2. Step 2: Convert to fraction form
   129,817.50/279,024 = 279,024/x
3. Step 3: Cross multiply
   129,817.50x = 279,024 × 279,024
4. Step 4: Simplify right side
   129,817.50x = 77,854,392,576
5. Step 5: Solve for x
   x = 77,854,392,576/129,817.50
6. Step 6: Final answer
   x = 599,721.86