Finding the Third Proportional to 656,830.69 and 989,944.03

Step by Step Solution

1. Step 1: Write the proportion equation
   656,830.69 : 989,944.03 = 989,944.03 : x
2. Step 2: Convert to fraction form
   656,830.69/989,944.03 = 989,944.03/x
3. Step 3: Cross multiply
   656,830.69x = 989,944.03 × 989,944.03
4. Step 4: Simplify right side
   656,830.69x = 979,989,185,007.50
5. Step 5: Solve for x
   x = 979,989,185,007.50/656,830.69
6. Step 6: Final answer
   x = 1,491,996.65