Finding the Third Proportional to 80,286.75 and 105,598.69

Step by Step Solution

1. Step 1: Write the proportion equation
   80,286.75 : 105,598.69 = 105,598.69 : x
2. Step 2: Convert to fraction form
   80,286.75/105,598.69 = 105,598.69/x
3. Step 3: Cross multiply
   80,286.75x = 105,598.69 × 105,598.69
4. Step 4: Simplify right side
   80,286.75x = 11,151,082,801.72
5. Step 5: Solve for x
   x = 11,151,082,801.72/80,286.75
6. Step 6: Final answer
   x = 138,890.70