Finding the Fourth Proportional to 8,559.31, 12,830.15 and 4,171.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,559.31 : 12,830.15 = 4,171.34 : x
2. Step 2: Convert to fraction form
   8,559.31/12,830.15 = 4,171.34/x
3. Step 3: Cross multiply
   8,559.31x = 12,830.15 × 4,171.34
4. Step 4: Simplify right side
   8,559.31x = 53,518,864.18
5. Step 5: Solve for x
   x = 53,518,864.18/8,559.31
6. Step 6: Final answer
   x = 6,252.71