Finding the Third Proportional to 66,796 and 99,978

Step by Step Solution

1. Step 1: Write the proportion equation
   66,796 : 99,978 = 99,978 : x
2. Step 2: Convert to fraction form
   66,796/99,978 = 99,978/x
3. Step 3: Cross multiply
   66,796x = 99,978 × 99,978
4. Step 4: Simplify right side
   66,796x = 9,995,600,484
5. Step 5: Solve for x
   x = 9,995,600,484/66,796
6. Step 6: Final answer
   x = 149,643.70