Finding the Third Proportional to 13,909 and 30,927.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,909 : 30,927.69 = 30,927.69 : x
2. Step 2: Convert to fraction form
   13,909/30,927.69 = 30,927.69/x
3. Step 3: Cross multiply
   13,909x = 30,927.69 × 30,927.69
4. Step 4: Simplify right side
   13,909x = 956,521,854.10
5. Step 5: Solve for x
   x = 956,521,854.10/13,909
6. Step 6: Final answer
   x = 68,769.99