Finding the Third Proportional to 111,618 and 142,803

Step by Step Solution

1. Step 1: Write the proportion equation
   111,618 : 142,803 = 142,803 : x
2. Step 2: Convert to fraction form
   111,618/142,803 = 142,803/x
3. Step 3: Cross multiply
   111,618x = 142,803 × 142,803
4. Step 4: Simplify right side
   111,618x = 20,392,696,809
5. Step 5: Solve for x
   x = 20,392,696,809/111,618
6. Step 6: Final answer
   x = 182,700.79