Finding the Third Proportional to 109,309.50 and 238,869

Step by Step Solution

1. Step 1: Write the proportion equation
   109,309.50 : 238,869 = 238,869 : x
2. Step 2: Convert to fraction form
   109,309.50/238,869 = 238,869/x
3. Step 3: Cross multiply
   109,309.50x = 238,869 × 238,869
4. Step 4: Simplify right side
   109,309.50x = 57,058,399,161
5. Step 5: Solve for x
   x = 57,058,399,161/109,309.50
6. Step 6: Final answer
   x = 521,989.39