Finding the Third Proportional to 69,078.38 and 103,189.78

Step by Step Solution

1. Step 1: Write the proportion equation
   69,078.38 : 103,189.78 = 103,189.78 : x
2. Step 2: Convert to fraction form
   69,078.38/103,189.78 = 103,189.78/x
3. Step 3: Cross multiply
   69,078.38x = 103,189.78 × 103,189.78
4. Step 4: Simplify right side
   69,078.38x = 10,648,130,954.42
5. Step 5: Solve for x
   x = 10,648,130,954.42/69,078.38
6. Step 6: Final answer
   x = 154,145.65