Finding the Third Proportional to 123,339 and 266,347.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,339 : 266,347.50 = 266,347.50 : x
2. Step 2: Convert to fraction form
   123,339/266,347.50 = 266,347.50/x
3. Step 3: Cross multiply
   123,339x = 266,347.50 × 266,347.50
4. Step 4: Simplify right side
   123,339x = 70,940,990,756.25
5. Step 5: Solve for x
   x = 70,940,990,756.25/123,339
6. Step 6: Final answer
   x = 575,170.80