Finding the Fourth Proportional to 6,488.88, 8,953.92 and 3,971.58

Step by Step Solution

1. Step 1: Write the proportion equation
   6,488.88 : 8,953.92 = 3,971.58 : x
2. Step 2: Convert to fraction form
   6,488.88/8,953.92 = 3,971.58/x
3. Step 3: Cross multiply
   6,488.88x = 8,953.92 × 3,971.58
4. Step 4: Simplify right side
   6,488.88x = 35,561,209.59
5. Step 5: Solve for x
   x = 35,561,209.59/6,488.88
6. Step 6: Final answer
   x = 5,480.33