Finding the Fourth Proportional to 9,421.89, 14,128.63 and 3,180.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,421.89 : 14,128.63 = 3,180.29 : x
2. Step 2: Convert to fraction form
   9,421.89/14,128.63 = 3,180.29/x
3. Step 3: Cross multiply
   9,421.89x = 14,128.63 × 3,180.29
4. Step 4: Simplify right side
   9,421.89x = 44,933,101.85
5. Step 5: Solve for x
   x = 44,933,101.85/9,421.89
6. Step 6: Final answer
   x = 4,769.01