Finding the Third Proportional to 13,910.25 and 30,930.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,910.25 : 30,930.75 = 30,930.75 : x
2. Step 2: Convert to fraction form
   13,910.25/30,930.75 = 30,930.75/x
3. Step 3: Cross multiply
   13,910.25x = 30,930.75 × 30,930.75
4. Step 4: Simplify right side
   13,910.25x = 956,711,295.56
5. Step 5: Solve for x
   x = 956,711,295.56/13,910.25
6. Step 6: Final answer
   x = 68,777.43