Finding the Third Proportional to 5,090,568 and 7,120,709

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090,568 : 7,120,709 = 7,120,709 : x
2. Step 2: Convert to fraction form
   5,090,568/7,120,709 = 7,120,709/x
3. Step 3: Cross multiply
   5,090,568x = 7,120,709 × 7,120,709
4. Step 4: Simplify right side
   5,090,568x = 50,704,496,662,681
5. Step 5: Solve for x
   x = 50,704,496,662,681/5,090,568
6. Step 6: Final answer
   x = 9,960,479.20