Finding the Third Proportional to 43,980.50 and 68,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,980.50 : 68,129.50 = 68,129.50 : x
2. Step 2: Convert to fraction form
   43,980.50/68,129.50 = 68,129.50/x
3. Step 3: Cross multiply
   43,980.50x = 68,129.50 × 68,129.50
4. Step 4: Simplify right side
   43,980.50x = 4,641,628,770.25
5. Step 5: Solve for x
   x = 4,641,628,770.25/43,980.50
6. Step 6: Final answer
   x = 105,538.34