Finding the Fourth Proportional to 9,978.72, 13,768.92 and 6,000.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.72 : 13,768.92 = 6,000.72 : x
2. Step 2: Convert to fraction form
   9,978.72/13,768.92 = 6,000.72/x
3. Step 3: Cross multiply
   9,978.72x = 13,768.92 × 6,000.72
4. Step 4: Simplify right side
   9,978.72x = 82,623,433.62
5. Step 5: Solve for x
   x = 82,623,433.62/9,978.72
6. Step 6: Final answer
   x = 8,279.96