Finding the Third Proportional to 111,278 and 247,436

Step by Step Solution

1. Step 1: Write the proportion equation
   111,278 : 247,436 = 247,436 : x
2. Step 2: Convert to fraction form
   111,278/247,436 = 247,436/x
3. Step 3: Cross multiply
   111,278x = 247,436 × 247,436
4. Step 4: Simplify right side
   111,278x = 61,224,574,096
5. Step 5: Solve for x
   x = 61,224,574,096/111,278
6. Step 6: Final answer
   x = 550,194.77