Finding the Third Proportional to 56,724.75 and 81,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,724.75 : 81,715.50 = 81,715.50 : x
2. Step 2: Convert to fraction form
   56,724.75/81,715.50 = 81,715.50/x
3. Step 3: Cross multiply
   56,724.75x = 81,715.50 × 81,715.50
4. Step 4: Simplify right side
   56,724.75x = 6,677,422,940.25
5. Step 5: Solve for x
   x = 6,677,422,940.25/56,724.75
6. Step 6: Final answer
   x = 117,716.22