Finding the Third Proportional to 3,978.07 and 8,669.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.07 : 8,669.43 = 8,669.43 : x
2. Step 2: Convert to fraction form
   3,978.07/8,669.43 = 8,669.43/x
3. Step 3: Cross multiply
   3,978.07x = 8,669.43 × 8,669.43
4. Step 4: Simplify right side
   3,978.07x = 75,158,943.38
5. Step 5: Solve for x
   x = 75,158,943.38/3,978.07
6. Step 6: Final answer
   x = 18,893.32