Finding the Third Proportional to 42,720.09 and 68,636.44

Step by Step Solution

1. Step 1: Write the proportion equation
   42,720.09 : 68,636.44 = 68,636.44 : x
2. Step 2: Convert to fraction form
   42,720.09/68,636.44 = 68,636.44/x
3. Step 3: Cross multiply
   42,720.09x = 68,636.44 × 68,636.44
4. Step 4: Simplify right side
   42,720.09x = 4,710,960,552.69
5. Step 5: Solve for x
   x = 4,710,960,552.69/42,720.09
6. Step 6: Final answer
   x = 110,275.05