Finding the Third Proportional to 59,720 and 91,308

Step by Step Solution

1. Step 1: Write the proportion equation
   59,720 : 91,308 = 91,308 : x
2. Step 2: Convert to fraction form
   59,720/91,308 = 91,308/x
3. Step 3: Cross multiply
   59,720x = 91,308 × 91,308
4. Step 4: Simplify right side
   59,720x = 8,337,150,864
5. Step 5: Solve for x
   x = 8,337,150,864/59,720
6. Step 6: Final answer
   x = 139,604.00