Finding the Third Proportional to 63,878.63 and 86,789.92

Step by Step Solution

1. Step 1: Write the proportion equation
   63,878.63 : 86,789.92 = 86,789.92 : x
2. Step 2: Convert to fraction form
   63,878.63/86,789.92 = 86,789.92/x
3. Step 3: Cross multiply
   63,878.63x = 86,789.92 × 86,789.92
4. Step 4: Simplify right side
   63,878.63x = 7,532,489,861.02
5. Step 5: Solve for x
   x = 7,532,489,861.02/63,878.63
6. Step 6: Final answer
   x = 117,918.79