Finding the Third Proportional to 420,170 and 899,404

Step by Step Solution

1. Step 1: Write the proportion equation
   420,170 : 899,404 = 899,404 : x
2. Step 2: Convert to fraction form
   420,170/899,404 = 899,404/x
3. Step 3: Cross multiply
   420,170x = 899,404 × 899,404
4. Step 4: Simplify right side
   420,170x = 808,927,555,216
5. Step 5: Solve for x
   x = 808,927,555,216/420,170
6. Step 6: Final answer
   x = 1,925,238.73