Finding the Third Proportional to 123,236 and 252,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,236 : 252,311.50 = 252,311.50 : x
2. Step 2: Convert to fraction form
   123,236/252,311.50 = 252,311.50/x
3. Step 3: Cross multiply
   123,236x = 252,311.50 × 252,311.50
4. Step 4: Simplify right side
   123,236x = 63,661,093,032.25
5. Step 5: Solve for x
   x = 63,661,093,032.25/123,236
6. Step 6: Final answer
   x = 516,578.70