Finding the Third Proportional to 68,100.75 and 89,920.13

Step by Step Solution

1. Step 1: Write the proportion equation
   68,100.75 : 89,920.13 = 89,920.13 : x
2. Step 2: Convert to fraction form
   68,100.75/89,920.13 = 89,920.13/x
3. Step 3: Cross multiply
   68,100.75x = 89,920.13 × 89,920.13
4. Step 4: Simplify right side
   68,100.75x = 8,085,628,880.02
5. Step 5: Solve for x
   x = 8,085,628,880.02/68,100.75
6. Step 6: Final answer
   x = 118,730.39