Finding the Third Proportional to 39,764 and 91,978

Step by Step Solution

1. Step 1: Write the proportion equation
   39,764 : 91,978 = 91,978 : x
2. Step 2: Convert to fraction form
   39,764/91,978 = 91,978/x
3. Step 3: Cross multiply
   39,764x = 91,978 × 91,978
4. Step 4: Simplify right side
   39,764x = 8,459,952,484
5. Step 5: Solve for x
   x = 8,459,952,484/39,764
6. Step 6: Final answer
   x = 212,754.06