Finding the Fourth Proportional to 12,013.67, 16,578.86 and 6,978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,013.67 : 16,578.86 = 6,978.84 : x
2. Step 2: Convert to fraction form
   12,013.67/16,578.86 = 6,978.84/x
3. Step 3: Cross multiply
   12,013.67x = 16,578.86 × 6,978.84
4. Step 4: Simplify right side
   12,013.67x = 115,701,176.43
5. Step 5: Solve for x
   x = 115,701,176.43/12,013.67
6. Step 6: Final answer
   x = 9,630.80