Finding the Third Proportional to 80,448 and 105,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,448 : 105,789.50 = 105,789.50 : x
2. Step 2: Convert to fraction form
   80,448/105,789.50 = 105,789.50/x
3. Step 3: Cross multiply
   80,448x = 105,789.50 × 105,789.50
4. Step 4: Simplify right side
   80,448x = 11,191,418,310.25
5. Step 5: Solve for x
   x = 11,191,418,310.25/80,448
6. Step 6: Final answer
   x = 139,113.69