Finding the Third Proportional to 455,765 and 989,290

Step by Step Solution

1. Step 1: Write the proportion equation
   455,765 : 989,290 = 989,290 : x
2. Step 2: Convert to fraction form
   455,765/989,290 = 989,290/x
3. Step 3: Cross multiply
   455,765x = 989,290 × 989,290
4. Step 4: Simplify right side
   455,765x = 978,694,704,100
5. Step 5: Solve for x
   x = 978,694,704,100/455,765
6. Step 6: Final answer
   x = 2,147,366.96