Finding the Fourth Proportional to 19,190.71, 28,789.98 and 8,097.40

Step by Step Solution

1. Step 1: Write the proportion equation
   19,190.71 : 28,789.98 = 8,097.40 : x
2. Step 2: Convert to fraction form
   19,190.71/28,789.98 = 8,097.40/x
3. Step 3: Cross multiply
   19,190.71x = 28,789.98 × 8,097.40
4. Step 4: Simplify right side
   19,190.71x = 233,123,984.05
5. Step 5: Solve for x
   x = 233,123,984.05/19,190.71
6. Step 6: Final answer
   x = 12,147.75