Finding the Third Proportional to 221,089.50 and 519,696

Step by Step Solution

1. Step 1: Write the proportion equation
   221,089.50 : 519,696 = 519,696 : x
2. Step 2: Convert to fraction form
   221,089.50/519,696 = 519,696/x
3. Step 3: Cross multiply
   221,089.50x = 519,696 × 519,696
4. Step 4: Simplify right side
   221,089.50x = 270,083,932,416
5. Step 5: Solve for x
   x = 270,083,932,416/221,089.50
6. Step 6: Final answer
   x = 1,221,604.52