Finding the Third Proportional to 33,987.94 and 68,640.75

Step by Step Solution

1. Step 1: Write the proportion equation
   33,987.94 : 68,640.75 = 68,640.75 : x
2. Step 2: Convert to fraction form
   33,987.94/68,640.75 = 68,640.75/x
3. Step 3: Cross multiply
   33,987.94x = 68,640.75 × 68,640.75
4. Step 4: Simplify right side
   33,987.94x = 4,711,552,560.56
5. Step 5: Solve for x
   x = 4,711,552,560.56/33,987.94
6. Step 6: Final answer
   x = 138,624.26