Finding the Fourth Proportional to 19,090.72, 28,604.96 and 9,717.86

Step by Step Solution

1. Step 1: Write the proportion equation
   19,090.72 : 28,604.96 = 9,717.86 : x
2. Step 2: Convert to fraction form
   19,090.72/28,604.96 = 9,717.86/x
3. Step 3: Cross multiply
   19,090.72x = 28,604.96 × 9,717.86
4. Step 4: Simplify right side
   19,090.72x = 277,978,996.59
5. Step 5: Solve for x
   x = 277,978,996.59/19,090.72
6. Step 6: Final answer
   x = 14,560.95