Finding the Third Proportional to 123,243 and 265,166.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,243 : 265,166.50 = 265,166.50 : x
2. Step 2: Convert to fraction form
   123,243/265,166.50 = 265,166.50/x
3. Step 3: Cross multiply
   123,243x = 265,166.50 × 265,166.50
4. Step 4: Simplify right side
   123,243x = 70,313,272,722.25
5. Step 5: Solve for x
   x = 70,313,272,722.25/123,243
6. Step 6: Final answer
   x = 570,525.49