Finding the Third Proportional to 33,910.50 and 68,779.50

Step by Step Solution

1. Step 1: Write the proportion equation
   33,910.50 : 68,779.50 = 68,779.50 : x
2. Step 2: Convert to fraction form
   33,910.50/68,779.50 = 68,779.50/x
3. Step 3: Cross multiply
   33,910.50x = 68,779.50 × 68,779.50
4. Step 4: Simplify right side
   33,910.50x = 4,730,619,620.25
5. Step 5: Solve for x
   x = 4,730,619,620.25/33,910.50
6. Step 6: Final answer
   x = 139,503.09