Finding the Third Proportional to 5,090,585 and 7,120,724

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090,585 : 7,120,724 = 7,120,724 : x
2. Step 2: Convert to fraction form
   5,090,585/7,120,724 = 7,120,724/x
3. Step 3: Cross multiply
   5,090,585x = 7,120,724 × 7,120,724
4. Step 4: Simplify right side
   5,090,585x = 50,704,710,284,176
5. Step 5: Solve for x
   x = 50,704,710,284,176/5,090,585
6. Step 6: Final answer
   x = 9,960,487.90