Finding the Third Proportional to 111,572 and 245,288

Step by Step Solution

1. Step 1: Write the proportion equation
   111,572 : 245,288 = 245,288 : x
2. Step 2: Convert to fraction form
   111,572/245,288 = 245,288/x
3. Step 3: Cross multiply
   111,572x = 245,288 × 245,288
4. Step 4: Simplify right side
   111,572x = 60,166,202,944
5. Step 5: Solve for x
   x = 60,166,202,944/111,572
6. Step 6: Final answer
   x = 539,258.98