Finding the Third Proportional to 129,606 and 265,669.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,606 : 265,669.50 = 265,669.50 : x
2. Step 2: Convert to fraction form
   129,606/265,669.50 = 265,669.50/x
3. Step 3: Cross multiply
   129,606x = 265,669.50 × 265,669.50
4. Step 4: Simplify right side
   129,606x = 70,580,283,230.25
5. Step 5: Solve for x
   x = 70,580,283,230.25/129,606
6. Step 6: Final answer
   x = 544,575.74