Finding the Third Proportional to 564,826.50 and 1,221,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   564,826.50 : 1,221,421.50 = 1,221,421.50 : x
2. Step 2: Convert to fraction form
   564,826.50/1,221,421.50 = 1,221,421.50/x
3. Step 3: Cross multiply
   564,826.50x = 1,221,421.50 × 1,221,421.50
4. Step 4: Simplify right side
   564,826.50x = 1,491,870,480,662.25
5. Step 5: Solve for x
   x = 1,491,870,480,662.25/564,826.50
6. Step 6: Final answer
   x = 2,641,289.81