Finding the Fourth Proportional to 6,978.35, 10,448.86 and 5,871.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.35 : 10,448.86 = 5,871.18 : x
2. Step 2: Convert to fraction form
   6,978.35/10,448.86 = 5,871.18/x
3. Step 3: Cross multiply
   6,978.35x = 10,448.86 × 5,871.18
4. Step 4: Simplify right side
   6,978.35x = 61,347,181.62
5. Step 5: Solve for x
   x = 61,347,181.62/6,978.35
6. Step 6: Final answer
   x = 8,791.07