Finding the Third Proportional to 123,385 and 265,485

Step by Step Solution

1. Step 1: Write the proportion equation
   123,385 : 265,485 = 265,485 : x
2. Step 2: Convert to fraction form
   123,385/265,485 = 265,485/x
3. Step 3: Cross multiply
   123,385x = 265,485 × 265,485
4. Step 4: Simplify right side
   123,385x = 70,482,285,225
5. Step 5: Solve for x
   x = 70,482,285,225/123,385
6. Step 6: Final answer
   x = 571,238.69