Finding the Fourth Proportional to 6,978.54, 10,449.18 and 5,871.37

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.54 : 10,449.18 = 5,871.37 : x
2. Step 2: Convert to fraction form
   6,978.54/10,449.18 = 5,871.37/x
3. Step 3: Cross multiply
   6,978.54x = 10,449.18 × 5,871.37
4. Step 4: Simplify right side
   6,978.54x = 61,351,001.98
5. Step 5: Solve for x
   x = 61,351,001.98/6,978.54
6. Step 6: Final answer
   x = 8,791.38