Finding the Third Proportional to 42,230 and 66,866

Step by Step Solution

1. Step 1: Write the proportion equation
   42,230 : 66,866 = 66,866 : x
2. Step 2: Convert to fraction form
   42,230/66,866 = 66,866/x
3. Step 3: Cross multiply
   42,230x = 66,866 × 66,866
4. Step 4: Simplify right side
   42,230x = 4,471,061,956
5. Step 5: Solve for x
   x = 4,471,061,956/42,230
6. Step 6: Final answer
   x = 105,874.07