Finding the Fourth Proportional to 19,194.91, 28,807.55 and 8,109.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,194.91 : 28,807.55 = 8,109.25 : x
2. Step 2: Convert to fraction form
   19,194.91/28,807.55 = 8,109.25/x
3. Step 3: Cross multiply
   19,194.91x = 28,807.55 × 8,109.25
4. Step 4: Simplify right side
   19,194.91x = 233,607,440.25
5. Step 5: Solve for x
   x = 233,607,440.25/19,194.91
6. Step 6: Final answer
   x = 12,170.28