Finding the Third Proportional to 16,978.78 and 36,208.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.78 : 36,208.69 = 36,208.69 : x
2. Step 2: Convert to fraction form
   16,978.78/36,208.69 = 36,208.69/x
3. Step 3: Cross multiply
   16,978.78x = 36,208.69 × 36,208.69
4. Step 4: Simplify right side
   16,978.78x = 1,311,069,050.47
5. Step 5: Solve for x
   x = 1,311,069,050.47/16,978.78
6. Step 6: Final answer
   x = 77,218.09