Finding the Third Proportional to 261,921 and 571,819.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,921 : 571,819.50 = 571,819.50 : x
2. Step 2: Convert to fraction form
   261,921/571,819.50 = 571,819.50/x
3. Step 3: Cross multiply
   261,921x = 571,819.50 × 571,819.50
4. Step 4: Simplify right side
   261,921x = 326,977,540,580.25
5. Step 5: Solve for x
   x = 326,977,540,580.25/261,921
6. Step 6: Final answer
   x = 1,248,382.30