Finding the Fourth Proportional to 7,978.38, 11,951.10 and 4,681.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.38 : 11,951.10 = 4,681.56 : x
2. Step 2: Convert to fraction form
   7,978.38/11,951.10 = 4,681.56/x
3. Step 3: Cross multiply
   7,978.38x = 11,951.10 × 4,681.56
4. Step 4: Simplify right side
   7,978.38x = 55,949,791.72
5. Step 5: Solve for x
   x = 55,949,791.72/7,978.38
6. Step 6: Final answer
   x = 7,012.68