Finding the Third Proportional to 54,418.50 and 81,946.69

Step by Step Solution

1. Step 1: Write the proportion equation
   54,418.50 : 81,946.69 = 81,946.69 : x
2. Step 2: Convert to fraction form
   54,418.50/81,946.69 = 81,946.69/x
3. Step 3: Cross multiply
   54,418.50x = 81,946.69 × 81,946.69
4. Step 4: Simplify right side
   54,418.50x = 6,715,259,592.22
5. Step 5: Solve for x
   x = 6,715,259,592.22/54,418.50
6. Step 6: Final answer
   x = 123,400.31