Finding the Third Proportional to 81,103.50 and 108,487.69

Step by Step Solution

1. Step 1: Write the proportion equation
   81,103.50 : 108,487.69 = 108,487.69 : x
2. Step 2: Convert to fraction form
   81,103.50/108,487.69 = 108,487.69/x
3. Step 3: Cross multiply
   81,103.50x = 108,487.69 × 108,487.69
4. Step 4: Simplify right side
   81,103.50x = 11,769,578,339.10
5. Step 5: Solve for x
   x = 11,769,578,339.10/81,103.50
6. Step 6: Final answer
   x = 145,118.01