Finding the Third Proportional to 456,947 and 990,160

Step by Step Solution

1. Step 1: Write the proportion equation
   456,947 : 990,160 = 990,160 : x
2. Step 2: Convert to fraction form
   456,947/990,160 = 990,160/x
3. Step 3: Cross multiply
   456,947x = 990,160 × 990,160
4. Step 4: Simplify right side
   456,947x = 980,416,825,600
5. Step 5: Solve for x
   x = 980,416,825,600/456,947
6. Step 6: Final answer
   x = 2,145,581.05