Finding the Third Proportional to 66,885.75 and 89,165.81

Step by Step Solution

1. Step 1: Write the proportion equation
   66,885.75 : 89,165.81 = 89,165.81 : x
2. Step 2: Convert to fraction form
   66,885.75/89,165.81 = 89,165.81/x
3. Step 3: Cross multiply
   66,885.75x = 89,165.81 × 89,165.81
4. Step 4: Simplify right side
   66,885.75x = 7,950,542,118.79
5. Step 5: Solve for x
   x = 7,950,542,118.79/66,885.75
6. Step 6: Final answer
   x = 118,867.50