Finding the Third Proportional to 53,812 and 80,910

Step by Step Solution

1. Step 1: Write the proportion equation
   53,812 : 80,910 = 80,910 : x
2. Step 2: Convert to fraction form
   53,812/80,910 = 80,910/x
3. Step 3: Cross multiply
   53,812x = 80,910 × 80,910
4. Step 4: Simplify right side
   53,812x = 6,546,428,100
5. Step 5: Solve for x
   x = 6,546,428,100/53,812
6. Step 6: Final answer
   x = 121,653.69