Finding the Third Proportional to 129,871.69 and 279,175.78

Step by Step Solution

1. Step 1: Write the proportion equation
   129,871.69 : 279,175.78 = 279,175.78 : x
2. Step 2: Convert to fraction form
   129,871.69/279,175.78 = 279,175.78/x
3. Step 3: Cross multiply
   129,871.69x = 279,175.78 × 279,175.78
4. Step 4: Simplify right side
   129,871.69x = 77,939,116,836.55
5. Step 5: Solve for x
   x = 77,939,116,836.55/129,871.69
6. Step 6: Final answer
   x = 600,124.00