Finding the Third Proportional to 69,078.13 and 103,189.25

Step by Step Solution

1. Step 1: Write the proportion equation
   69,078.13 : 103,189.25 = 103,189.25 : x
2. Step 2: Convert to fraction form
   69,078.13/103,189.25 = 103,189.25/x
3. Step 3: Cross multiply
   69,078.13x = 103,189.25 × 103,189.25
4. Step 4: Simplify right side
   69,078.13x = 10,648,021,315.56
5. Step 5: Solve for x
   x = 10,648,021,315.56/69,078.13
6. Step 6: Final answer
   x = 154,144.62