Finding the Fourth Proportional to 8,978.43, 12,369.59 and 7,089.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.43 : 12,369.59 = 7,089.32 : x
2. Step 2: Convert to fraction form
   8,978.43/12,369.59 = 7,089.32/x
3. Step 3: Cross multiply
   8,978.43x = 12,369.59 × 7,089.32
4. Step 4: Simplify right side
   8,978.43x = 87,691,950.49
5. Step 5: Solve for x
   x = 87,691,950.49/8,978.43
6. Step 6: Final answer
   x = 9,766.96