Finding the Fourth Proportional to 9,719.91, 14,504.04 and 8,672.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,719.91 : 14,504.04 = 8,672.72 : x
2. Step 2: Convert to fraction form
   9,719.91/14,504.04 = 8,672.72/x
3. Step 3: Cross multiply
   9,719.91x = 14,504.04 × 8,672.72
4. Step 4: Simplify right side
   9,719.91x = 125,789,477.79
5. Step 5: Solve for x
   x = 125,789,477.79/9,719.91
6. Step 6: Final answer
   x = 12,941.42