Finding the Third Proportional to 54,311.50 and 81,814.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,311.50 : 81,814.50 = 81,814.50 : x
2. Step 2: Convert to fraction form
   54,311.50/81,814.50 = 81,814.50/x
3. Step 3: Cross multiply
   54,311.50x = 81,814.50 × 81,814.50
4. Step 4: Simplify right side
   54,311.50x = 6,693,612,410.25
5. Step 5: Solve for x
   x = 6,693,612,410.25/54,311.50
6. Step 6: Final answer
   x = 123,244.85