Finding the Third Proportional to 268,559.30 and 388,383.61

Step by Step Solution

1. Step 1: Write the proportion equation
   268,559.30 : 388,383.61 = 388,383.61 : x
2. Step 2: Convert to fraction form
   268,559.30/388,383.61 = 388,383.61/x
3. Step 3: Cross multiply
   268,559.30x = 388,383.61 × 388,383.61
4. Step 4: Simplify right side
   268,559.30x = 150,841,828,031.15
5. Step 5: Solve for x
   x = 150,841,828,031.15/268,559.30
6. Step 6: Final answer
   x = 561,670.48