Finding the Third Proportional to 52,456 and 81,789

Step by Step Solution

1. Step 1: Write the proportion equation
   52,456 : 81,789 = 81,789 : x
2. Step 2: Convert to fraction form
   52,456/81,789 = 81,789/x
3. Step 3: Cross multiply
   52,456x = 81,789 × 81,789
4. Step 4: Simplify right side
   52,456x = 6,689,440,521
5. Step 5: Solve for x
   x = 6,689,440,521/52,456
6. Step 6: Final answer
   x = 127,524.79