Finding the Third Proportional to 43,318.50 and 68,920.75

Step by Step Solution

1. Step 1: Write the proportion equation
   43,318.50 : 68,920.75 = 68,920.75 : x
2. Step 2: Convert to fraction form
   43,318.50/68,920.75 = 68,920.75/x
3. Step 3: Cross multiply
   43,318.50x = 68,920.75 × 68,920.75
4. Step 4: Simplify right side
   43,318.50x = 4,750,069,780.56
5. Step 5: Solve for x
   x = 4,750,069,780.56/43,318.50
6. Step 6: Final answer
   x = 109,654.53