Finding the Third Proportional to 456,009 and 989,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   456,009 : 989,899.50 = 989,899.50 : x
2. Step 2: Convert to fraction form
   456,009/989,899.50 = 989,899.50/x
3. Step 3: Cross multiply
   456,009x = 989,899.50 × 989,899.50
4. Step 4: Simplify right side
   456,009x = 979,901,020,100.25
5. Step 5: Solve for x
   x = 979,901,020,100.25/456,009
6. Step 6: Final answer
   x = 2,148,863.33