Finding the Fourth Proportional to 14,973.72, 20,658.72 and 9,672.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,973.72 : 20,658.72 = 9,672.12 : x
2. Step 2: Convert to fraction form
   14,973.72/20,658.72 = 9,672.12/x
3. Step 3: Cross multiply
   14,973.72x = 20,658.72 × 9,672.12
4. Step 4: Simplify right side
   14,973.72x = 199,813,618.89
5. Step 5: Solve for x
   x = 199,813,618.89/14,973.72
6. Step 6: Final answer
   x = 13,344.29