Finding the Third Proportional to 86,412 and 123,570

Step by Step Solution

1. Step 1: Write the proportion equation
   86,412 : 123,570 = 123,570 : x
2. Step 2: Convert to fraction form
   86,412/123,570 = 123,570/x
3. Step 3: Cross multiply
   86,412x = 123,570 × 123,570
4. Step 4: Simplify right side
   86,412x = 15,269,544,900
5. Step 5: Solve for x
   x = 15,269,544,900/86,412
6. Step 6: Final answer
   x = 176,706.30