Finding the Third Proportional to 5,090,583 and 7,120,729

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090,583 : 7,120,729 = 7,120,729 : x
2. Step 2: Convert to fraction form
   5,090,583/7,120,729 = 7,120,729/x
3. Step 3: Cross multiply
   5,090,583x = 7,120,729 × 7,120,729
4. Step 4: Simplify right side
   5,090,583x = 50,704,781,491,441
5. Step 5: Solve for x
   x = 50,704,781,491,441/5,090,583
6. Step 6: Final answer
   x = 9,960,505.80