Finding the Third Proportional to 100,905.50 and 221,492

Step by Step Solution

1. Step 1: Write the proportion equation
   100,905.50 : 221,492 = 221,492 : x
2. Step 2: Convert to fraction form
   100,905.50/221,492 = 221,492/x
3. Step 3: Cross multiply
   100,905.50x = 221,492 × 221,492
4. Step 4: Simplify right side
   100,905.50x = 49,058,706,064
5. Step 5: Solve for x
   x = 49,058,706,064/100,905.50
6. Step 6: Final answer
   x = 486,184.66