Finding the Third Proportional to 605,205 and 890,284.50

Step by Step Solution

1. Step 1: Write the proportion equation
   605,205 : 890,284.50 = 890,284.50 : x
2. Step 2: Convert to fraction form
   605,205/890,284.50 = 890,284.50/x
3. Step 3: Cross multiply
   605,205x = 890,284.50 × 890,284.50
4. Step 4: Simplify right side
   605,205x = 792,606,490,940.25
5. Step 5: Solve for x
   x = 792,606,490,940.25/605,205
6. Step 6: Final answer
   x = 1,309,649.61