Finding the Third Proportional to 111,276 and 247,428

Step by Step Solution

1. Step 1: Write the proportion equation
   111,276 : 247,428 = 247,428 : x
2. Step 2: Convert to fraction form
   111,276/247,428 = 247,428/x
3. Step 3: Cross multiply
   111,276x = 247,428 × 247,428
4. Step 4: Simplify right side
   111,276x = 61,220,615,184
5. Step 5: Solve for x
   x = 61,220,615,184/111,276
6. Step 6: Final answer
   x = 550,169.09