Finding the Fourth Proportional to 6,978.88, 10,471.91 and 3,858.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.88 : 10,471.91 = 3,858.31 : x
2. Step 2: Convert to fraction form
   6,978.88/10,471.91 = 3,858.31/x
3. Step 3: Cross multiply
   6,978.88x = 10,471.91 × 3,858.31
4. Step 4: Simplify right side
   6,978.88x = 40,403,875.07
5. Step 5: Solve for x
   x = 40,403,875.07/6,978.88
6. Step 6: Final answer
   x = 5,789.45