Finding the Third Proportional to 90,286.88 and 120,789

Step by Step Solution

1. Step 1: Write the proportion equation
   90,286.88 : 120,789 = 120,789 : x
2. Step 2: Convert to fraction form
   90,286.88/120,789 = 120,789/x
3. Step 3: Cross multiply
   90,286.88x = 120,789 × 120,789
4. Step 4: Simplify right side
   90,286.88x = 14,589,982,521
5. Step 5: Solve for x
   x = 14,589,982,521/90,286.88
6. Step 6: Final answer
   x = 161,595.83