Finding the Fourth Proportional to 12,472.90, 17,218.98 and 9,633.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,472.90 : 17,218.98 = 9,633.91 : x
2. Step 2: Convert to fraction form
   12,472.90/17,218.98 = 9,633.91/x
3. Step 3: Cross multiply
   12,472.90x = 17,218.98 × 9,633.91
4. Step 4: Simplify right side
   12,472.90x = 165,886,103.61
5. Step 5: Solve for x
   x = 165,886,103.61/12,472.90
6. Step 6: Final answer
   x = 13,299.72