Finding the Third Proportional to 11,800,699.31 and 18,225,109.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,800,699.31 : 18,225,109.69 = 18,225,109.69 : x
2. Step 2: Convert to fraction form
   11,800,699.31/18,225,109.69 = 18,225,109.69/x
3. Step 3: Cross multiply
   11,800,699.31x = 18,225,109.69 × 18,225,109.69
4. Step 4: Simplify right side
   11,800,699.31x = 332,154,623,121,406.38
5. Step 5: Solve for x
   x = 332,154,623,121,406.38/11,800,699.31
6. Step 6: Final answer
   x = 28,147,028.78