Finding the Third Proportional to 9,978,688.69 and 11,028,448.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978,688.69 : 11,028,448.69 = 11,028,448.69 : x
2. Step 2: Convert to fraction form
   9,978,688.69/11,028,448.69 = 11,028,448.69/x
3. Step 3: Cross multiply
   9,978,688.69x = 11,028,448.69 × 11,028,448.69
4. Step 4: Simplify right side
   9,978,688.69x = 121,626,680,452,820.47
5. Step 5: Solve for x
   x = 121,626,680,452,820.47/9,978,688.69
6. Step 6: Final answer
   x = 12,188,643.64