Finding the Third Proportional to 28,768.50 and 68,640.75

Step by Step Solution

1. Step 1: Write the proportion equation
   28,768.50 : 68,640.75 = 68,640.75 : x
2. Step 2: Convert to fraction form
   28,768.50/68,640.75 = 68,640.75/x
3. Step 3: Cross multiply
   28,768.50x = 68,640.75 × 68,640.75
4. Step 4: Simplify right side
   28,768.50x = 4,711,552,560.56
5. Step 5: Solve for x
   x = 4,711,552,560.56/28,768.50
6. Step 6: Final answer
   x = 163,774.70