Finding the Fourth Proportional to 13,320.04, 19,956.84 and 8,644.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.04 : 19,956.84 = 8,644.72 : x
2. Step 2: Convert to fraction form
   13,320.04/19,956.84 = 8,644.72/x
3. Step 3: Cross multiply
   13,320.04x = 19,956.84 × 8,644.72
4. Step 4: Simplify right side
   13,320.04x = 172,521,293.88
5. Step 5: Solve for x
   x = 172,521,293.88/13,320.04
6. Step 6: Final answer
   x = 12,952.01