Finding the Third Proportional to 109,215 and 238,635

Step by Step Solution

1. Step 1: Write the proportion equation
   109,215 : 238,635 = 238,635 : x
2. Step 2: Convert to fraction form
   109,215/238,635 = 238,635/x
3. Step 3: Cross multiply
   109,215x = 238,635 × 238,635
4. Step 4: Simplify right side
   109,215x = 56,946,663,225
5. Step 5: Solve for x
   x = 56,946,663,225/109,215
6. Step 6: Final answer
   x = 521,417.97