Finding the Third Proportional to 123,290 and 265,308

Step by Step Solution

1. Step 1: Write the proportion equation
   123,290 : 265,308 = 265,308 : x
2. Step 2: Convert to fraction form
   123,290/265,308 = 265,308/x
3. Step 3: Cross multiply
   123,290x = 265,308 × 265,308
4. Step 4: Simplify right side
   123,290x = 70,388,334,864
5. Step 5: Solve for x
   x = 70,388,334,864/123,290
6. Step 6: Final answer
   x = 570,916.82