Finding the Fourth Proportional to 12,401.72, 17,116.38 and 9,573.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,401.72 : 17,116.38 = 9,573.20 : x
2. Step 2: Convert to fraction form
   12,401.72/17,116.38 = 9,573.20/x
3. Step 3: Cross multiply
   12,401.72x = 17,116.38 × 9,573.20
4. Step 4: Simplify right side
   12,401.72x = 163,858,529.02
5. Step 5: Solve for x
   x = 163,858,529.02/12,401.72
6. Step 6: Final answer
   x = 13,212.56