Finding the Third Proportional to 456,916 and 990,100

Step by Step Solution

1. Step 1: Write the proportion equation
   456,916 : 990,100 = 990,100 : x
2. Step 2: Convert to fraction form
   456,916/990,100 = 990,100/x
3. Step 3: Cross multiply
   456,916x = 990,100 × 990,100
4. Step 4: Simplify right side
   456,916x = 980,298,010,000
5. Step 5: Solve for x
   x = 980,298,010,000/456,916
6. Step 6: Final answer
   x = 2,145,466.58