Finding the Third Proportional to 72,860 and 111,406

Step by Step Solution

1. Step 1: Write the proportion equation
   72,860 : 111,406 = 111,406 : x
2. Step 2: Convert to fraction form
   72,860/111,406 = 111,406/x
3. Step 3: Cross multiply
   72,860x = 111,406 × 111,406
4. Step 4: Simplify right side
   72,860x = 12,411,296,836
5. Step 5: Solve for x
   x = 12,411,296,836/72,860
6. Step 6: Final answer
   x = 170,344.45