Finding the Third Proportional to 111,413 and 243,879

Step by Step Solution

1. Step 1: Write the proportion equation
   111,413 : 243,879 = 243,879 : x
2. Step 2: Convert to fraction form
   111,413/243,879 = 243,879/x
3. Step 3: Cross multiply
   111,413x = 243,879 × 243,879
4. Step 4: Simplify right side
   111,413x = 59,476,966,641
5. Step 5: Solve for x
   x = 59,476,966,641/111,413
6. Step 6: Final answer
   x = 533,842.25