Finding the Third Proportional to 81,493.88 and 129,672.56

Step by Step Solution

1. Step 1: Write the proportion equation
   81,493.88 : 129,672.56 = 129,672.56 : x
2. Step 2: Convert to fraction form
   81,493.88/129,672.56 = 129,672.56/x
3. Step 3: Cross multiply
   81,493.88x = 129,672.56 × 129,672.56
4. Step 4: Simplify right side
   81,493.88x = 16,814,973,465.32
5. Step 5: Solve for x
   x = 16,814,973,465.32/81,493.88
6. Step 6: Final answer
   x = 206,334.20