Finding the Fourth Proportional to 14,780.72, 20,399.37 and 9,476.84

Step by Step Solution

1. Step 1: Write the proportion equation
   14,780.72 : 20,399.37 = 9,476.84 : x
2. Step 2: Convert to fraction form
   14,780.72/20,399.37 = 9,476.84/x
3. Step 3: Cross multiply
   14,780.72x = 20,399.37 × 9,476.84
4. Step 4: Simplify right side
   14,780.72x = 193,321,565.59
5. Step 5: Solve for x
   x = 193,321,565.59/14,780.72
6. Step 6: Final answer
   x = 13,079.31