Finding the Fourth Proportional to 14,971.42, 20,658.72 and 9,002.80

Step by Step Solution

1. Step 1: Write the proportion equation
   14,971.42 : 20,658.72 = 9,002.80 : x
2. Step 2: Convert to fraction form
   14,971.42/20,658.72 = 9,002.80/x
3. Step 3: Cross multiply
   14,971.42x = 20,658.72 × 9,002.80
4. Step 4: Simplify right side
   14,971.42x = 185,986,324.42
5. Step 5: Solve for x
   x = 185,986,324.42/14,971.42
6. Step 6: Final answer
   x = 12,422.76