Finding the Fourth Proportional to 10,978.20, 15,147 and 6,262.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.20 : 15,147 = 6,262.38 : x
2. Step 2: Convert to fraction form
   10,978.20/15,147 = 6,262.38/x
3. Step 3: Cross multiply
   10,978.20x = 15,147 × 6,262.38
4. Step 4: Simplify right side
   10,978.20x = 94,856,269.86
5. Step 5: Solve for x
   x = 94,856,269.86/10,978.20
6. Step 6: Final answer
   x = 8,640.42