Finding the Third Proportional to 64,732 and 99,978

Step by Step Solution

1. Step 1: Write the proportion equation
   64,732 : 99,978 = 99,978 : x
2. Step 2: Convert to fraction form
   64,732/99,978 = 99,978/x
3. Step 3: Cross multiply
   64,732x = 99,978 × 99,978
4. Step 4: Simplify right side
   64,732x = 9,995,600,484
5. Step 5: Solve for x
   x = 9,995,600,484/64,732
6. Step 6: Final answer
   x = 154,415.13