Finding the Third Proportional to 417,012 and 915,216

Step by Step Solution

1. Step 1: Write the proportion equation
   417,012 : 915,216 = 915,216 : x
2. Step 2: Convert to fraction form
   417,012/915,216 = 915,216/x
3. Step 3: Cross multiply
   417,012x = 915,216 × 915,216
4. Step 4: Simplify right side
   417,012x = 837,620,326,656
5. Step 5: Solve for x
   x = 837,620,326,656/417,012
6. Step 6: Final answer
   x = 2,008,624.04