Finding the Third Proportional to 111,858 and 245,820

Step by Step Solution

1. Step 1: Write the proportion equation
   111,858 : 245,820 = 245,820 : x
2. Step 2: Convert to fraction form
   111,858/245,820 = 245,820/x
3. Step 3: Cross multiply
   111,858x = 245,820 × 245,820
4. Step 4: Simplify right side
   111,858x = 60,427,472,400
5. Step 5: Solve for x
   x = 60,427,472,400/111,858
6. Step 6: Final answer
   x = 540,215.92