Finding the Third Proportional to 42,618 and 89,730

Step by Step Solution

1. Step 1: Write the proportion equation
   42,618 : 89,730 = 89,730 : x
2. Step 2: Convert to fraction form
   42,618/89,730 = 89,730/x
3. Step 3: Cross multiply
   42,618x = 89,730 × 89,730
4. Step 4: Simplify right side
   42,618x = 8,051,472,900
5. Step 5: Solve for x
   x = 8,051,472,900/42,618
6. Step 6: Final answer
   x = 188,921.89