Finding the Third Proportional to 659,601 and 991,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   659,601 : 991,039.50 = 991,039.50 : x
2. Step 2: Convert to fraction form
   659,601/991,039.50 = 991,039.50/x
3. Step 3: Cross multiply
   659,601x = 991,039.50 × 991,039.50
4. Step 4: Simplify right side
   659,601x = 982,159,290,560.25
5. Step 5: Solve for x
   x = 982,159,290,560.25/659,601
6. Step 6: Final answer
   x = 1,489,020.32