Finding the Third Proportional to 123,235.50 and 252,309

Step by Step Solution

1. Step 1: Write the proportion equation
   123,235.50 : 252,309 = 252,309 : x
2. Step 2: Convert to fraction form
   123,235.50/252,309 = 252,309/x
3. Step 3: Cross multiply
   123,235.50x = 252,309 × 252,309
4. Step 4: Simplify right side
   123,235.50x = 63,659,831,481
5. Step 5: Solve for x
   x = 63,659,831,481/123,235.50
6. Step 6: Final answer
   x = 516,570.56