Finding the Third Proportional to 42,230 and 66,864

Step by Step Solution

1. Step 1: Write the proportion equation
   42,230 : 66,864 = 66,864 : x
2. Step 2: Convert to fraction form
   42,230/66,864 = 66,864/x
3. Step 3: Cross multiply
   42,230x = 66,864 × 66,864
4. Step 4: Simplify right side
   42,230x = 4,470,794,496
5. Step 5: Solve for x
   x = 4,470,794,496/42,230
6. Step 6: Final answer
   x = 105,867.74