Finding the Third Proportional to 501,990 and 978,757.50

Step by Step Solution

1. Step 1: Write the proportion equation
   501,990 : 978,757.50 = 978,757.50 : x
2. Step 2: Convert to fraction form
   501,990/978,757.50 = 978,757.50/x
3. Step 3: Cross multiply
   501,990x = 978,757.50 × 978,757.50
4. Step 4: Simplify right side
   501,990x = 957,966,243,806.25
5. Step 5: Solve for x
   x = 957,966,243,806.25/501,990
6. Step 6: Final answer
   x = 1,908,337.31