Finding the Third Proportional to 123,060 and 289,745.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,060 : 289,745.50 = 289,745.50 : x
2. Step 2: Convert to fraction form
   123,060/289,745.50 = 289,745.50/x
3. Step 3: Cross multiply
   123,060x = 289,745.50 × 289,745.50
4. Step 4: Simplify right side
   123,060x = 83,952,454,770.25
5. Step 5: Solve for x
   x = 83,952,454,770.25/123,060
6. Step 6: Final answer
   x = 682,207.50