Finding the Third Proportional to 54,339.75 and 84,069.75

Step by Step Solution

1. Step 1: Write the proportion equation
   54,339.75 : 84,069.75 = 84,069.75 : x
2. Step 2: Convert to fraction form
   54,339.75/84,069.75 = 84,069.75/x
3. Step 3: Cross multiply
   54,339.75x = 84,069.75 × 84,069.75
4. Step 4: Simplify right side
   54,339.75x = 7,067,722,865.06
5. Step 5: Solve for x
   x = 7,067,722,865.06/54,339.75
6. Step 6: Final answer
   x = 130,065.43