Finding the Third Proportional to 80,442 and 105,783

Step by Step Solution

1. Step 1: Write the proportion equation
   80,442 : 105,783 = 105,783 : x
2. Step 2: Convert to fraction form
   80,442/105,783 = 105,783/x
3. Step 3: Cross multiply
   80,442x = 105,783 × 105,783
4. Step 4: Simplify right side
   80,442x = 11,190,043,089
5. Step 5: Solve for x
   x = 11,190,043,089/80,442
6. Step 6: Final answer
   x = 139,106.97