Finding the Third Proportional to 551,211 and 826,819.50

Step by Step Solution

1. Step 1: Write the proportion equation
   551,211 : 826,819.50 = 826,819.50 : x
2. Step 2: Convert to fraction form
   551,211/826,819.50 = 826,819.50/x
3. Step 3: Cross multiply
   551,211x = 826,819.50 × 826,819.50
4. Step 4: Simplify right side
   551,211x = 683,630,485,580.25
5. Step 5: Solve for x
   x = 683,630,485,580.25/551,211
6. Step 6: Final answer
   x = 1,240,233.75