Finding the Third Proportional to 111,576 and 245,328

Step by Step Solution

1. Step 1: Write the proportion equation
   111,576 : 245,328 = 245,328 : x
2. Step 2: Convert to fraction form
   111,576/245,328 = 245,328/x
3. Step 3: Cross multiply
   111,576x = 245,328 × 245,328
4. Step 4: Simplify right side
   111,576x = 60,185,827,584
5. Step 5: Solve for x
   x = 60,185,827,584/111,576
6. Step 6: Final answer
   x = 539,415.53