Finding the Fourth Proportional to 9,661.72, 14,499.08 and 3,421.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,661.72 : 14,499.08 = 3,421.72 : x
2. Step 2: Convert to fraction form
   9,661.72/14,499.08 = 3,421.72/x
3. Step 3: Cross multiply
   9,661.72x = 14,499.08 × 3,421.72
4. Step 4: Simplify right side
   9,661.72x = 49,611,792.02
5. Step 5: Solve for x
   x = 49,611,792.02/9,661.72
6. Step 6: Final answer
   x = 5,134.88