Finding the Fourth Proportional to 6,417.52, 9,620.05 and 3,128.82

Step by Step Solution

1. Step 1: Write the proportion equation
   6,417.52 : 9,620.05 = 3,128.82 : x
2. Step 2: Convert to fraction form
   6,417.52/9,620.05 = 3,128.82/x
3. Step 3: Cross multiply
   6,417.52x = 9,620.05 × 3,128.82
4. Step 4: Simplify right side
   6,417.52x = 30,099,404.84
5. Step 5: Solve for x
   x = 30,099,404.84/6,417.52
6. Step 6: Final answer
   x = 4,690.19