Finding the Fourth Proportional to 12,282.78, 16,950.69 and 6,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,282.78 : 16,950.69 = 6,978.50 : x
2. Step 2: Convert to fraction form
   12,282.78/16,950.69 = 6,978.50/x
3. Step 3: Cross multiply
   12,282.78x = 16,950.69 × 6,978.50
4. Step 4: Simplify right side
   12,282.78x = 118,290,305.41
5. Step 5: Solve for x
   x = 118,290,305.41/12,282.78
6. Step 6: Final answer
   x = 9,630.58