Finding the Third Proportional to 124,209 and 268,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   124,209 : 268,105.50 = 268,105.50 : x
2. Step 2: Convert to fraction form
   124,209/268,105.50 = 268,105.50/x
3. Step 3: Cross multiply
   124,209x = 268,105.50 × 268,105.50
4. Step 4: Simplify right side
   124,209x = 71,880,559,130.25
5. Step 5: Solve for x
   x = 71,880,559,130.25/124,209
6. Step 6: Final answer
   x = 578,706.53