Finding the Third Proportional to 64,860.75 and 82,878.19

Step by Step Solution

1. Step 1: Write the proportion equation
   64,860.75 : 82,878.19 = 82,878.19 : x
2. Step 2: Convert to fraction form
   64,860.75/82,878.19 = 82,878.19/x
3. Step 3: Cross multiply
   64,860.75x = 82,878.19 × 82,878.19
4. Step 4: Simplify right side
   64,860.75x = 6,868,793,963.29
5. Step 5: Solve for x
   x = 6,868,793,963.29/64,860.75
6. Step 6: Final answer
   x = 105,900.63