Finding the Third Proportional to 422,289 and 911,008.69

Step by Step Solution

1. Step 1: Write the proportion equation
   422,289 : 911,008.69 = 911,008.69 : x
2. Step 2: Convert to fraction form
   422,289/911,008.69 = 911,008.69/x
3. Step 3: Cross multiply
   422,289x = 911,008.69 × 911,008.69
4. Step 4: Simplify right side
   422,289x = 829,936,828,700.47
5. Step 5: Solve for x
   x = 829,936,828,700.47/422,289
6. Step 6: Final answer
   x = 1,965,329.03