Finding the Third Proportional to 81,015.75 and 126,111

Step by Step Solution

1. Step 1: Write the proportion equation
   81,015.75 : 126,111 = 126,111 : x
2. Step 2: Convert to fraction form
   81,015.75/126,111 = 126,111/x
3. Step 3: Cross multiply
   81,015.75x = 126,111 × 126,111
4. Step 4: Simplify right side
   81,015.75x = 15,903,984,321
5. Step 5: Solve for x
   x = 15,903,984,321/81,015.75
6. Step 6: Final answer
   x = 196,307.31