Finding the Third Proportional to 110,824.50 and 216,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   110,824.50 : 216,109.50 = 216,109.50 : x
2. Step 2: Convert to fraction form
   110,824.50/216,109.50 = 216,109.50/x
3. Step 3: Cross multiply
   110,824.50x = 216,109.50 × 216,109.50
4. Step 4: Simplify right side
   110,824.50x = 46,703,315,990.25
5. Step 5: Solve for x
   x = 46,703,315,990.25/110,824.50
6. Step 6: Final answer
   x = 421,416.89