Finding the Fourth Proportional to 6,128.71, 8,458.56 and 3,475.55

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.71 : 8,458.56 = 3,475.55 : x
2. Step 2: Convert to fraction form
   6,128.71/8,458.56 = 3,475.55/x
3. Step 3: Cross multiply
   6,128.71x = 8,458.56 × 3,475.55
4. Step 4: Simplify right side
   6,128.71x = 29,398,169.35
5. Step 5: Solve for x
   x = 29,398,169.35/6,128.71
6. Step 6: Final answer
   x = 4,796.80