Finding the Fourth Proportional to 9,171.89, 12,657.09 and 4,980.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.89 : 12,657.09 = 4,980.14 : x
2. Step 2: Convert to fraction form
   9,171.89/12,657.09 = 4,980.14/x
3. Step 3: Cross multiply
   9,171.89x = 12,657.09 × 4,980.14
4. Step 4: Simplify right side
   9,171.89x = 63,034,016.91
5. Step 5: Solve for x
   x = 63,034,016.91/9,171.89
6. Step 6: Final answer
   x = 6,872.53