Finding the Third Proportional to 69,310.69 and 154,408.78

Step by Step Solution

1. Step 1: Write the proportion equation
   69,310.69 : 154,408.78 = 154,408.78 : x
2. Step 2: Convert to fraction form
   69,310.69/154,408.78 = 154,408.78/x
3. Step 3: Cross multiply
   69,310.69x = 154,408.78 × 154,408.78
4. Step 4: Simplify right side
   69,310.69x = 23,842,071,727.11
5. Step 5: Solve for x
   x = 23,842,071,727.11/69,310.69
6. Step 6: Final answer
   x = 343,988.39