Finding the Third Proportional to 123,015 and 266,455.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,015 : 266,455.50 = 266,455.50 : x
2. Step 2: Convert to fraction form
   123,015/266,455.50 = 266,455.50/x
3. Step 3: Cross multiply
   123,015x = 266,455.50 × 266,455.50
4. Step 4: Simplify right side
   123,015x = 70,998,533,480.25
5. Step 5: Solve for x
   x = 70,998,533,480.25/123,015
6. Step 6: Final answer
   x = 577,153.46