Finding the Third Proportional to 81,703.69 and 123,778.13

Step by Step Solution

1. Step 1: Write the proportion equation
   81,703.69 : 123,778.13 = 123,778.13 : x
2. Step 2: Convert to fraction form
   81,703.69/123,778.13 = 123,778.13/x
3. Step 3: Cross multiply
   81,703.69x = 123,778.13 × 123,778.13
4. Step 4: Simplify right side
   81,703.69x = 15,321,024,228.52
5. Step 5: Solve for x
   x = 15,321,024,228.52/81,703.69
6. Step 6: Final answer
   x = 187,519.37