Finding the Third Proportional to 442,702 and 978,440

Step by Step Solution

1. Step 1: Write the proportion equation
   442,702 : 978,440 = 978,440 : x
2. Step 2: Convert to fraction form
   442,702/978,440 = 978,440/x
3. Step 3: Cross multiply
   442,702x = 978,440 × 978,440
4. Step 4: Simplify right side
   442,702x = 957,344,833,600
5. Step 5: Solve for x
   x = 957,344,833,600/442,702
6. Step 6: Final answer
   x = 2,162,503.97