Finding the Third Proportional to 66,917.25 and 89,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,917.25 : 89,212.50 = 89,212.50 : x
2. Step 2: Convert to fraction form
   66,917.25/89,212.50 = 89,212.50/x
3. Step 3: Cross multiply
   66,917.25x = 89,212.50 × 89,212.50
4. Step 4: Simplify right side
   66,917.25x = 7,958,870,156.25
5. Step 5: Solve for x
   x = 7,958,870,156.25/66,917.25
6. Step 6: Final answer
   x = 118,936.00