Finding the Third Proportional to 456,956 and 990,180

Step by Step Solution

1. Step 1: Write the proportion equation
   456,956 : 990,180 = 990,180 : x
2. Step 2: Convert to fraction form
   456,956/990,180 = 990,180/x
3. Step 3: Cross multiply
   456,956x = 990,180 × 990,180
4. Step 4: Simplify right side
   456,956x = 980,456,432,400
5. Step 5: Solve for x
   x = 980,456,432,400/456,956
6. Step 6: Final answer
   x = 2,145,625.47