Finding the Third Proportional to 69,278 and 111,570

Step by Step Solution

1. Step 1: Write the proportion equation
   69,278 : 111,570 = 111,570 : x
2. Step 2: Convert to fraction form
   69,278/111,570 = 111,570/x
3. Step 3: Cross multiply
   69,278x = 111,570 × 111,570
4. Step 4: Simplify right side
   69,278x = 12,447,864,900
5. Step 5: Solve for x
   x = 12,447,864,900/69,278
6. Step 6: Final answer
   x = 179,679.91