Finding the Fourth Proportional to 8,123.91, 12,185.33 and 3,194.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.91 : 12,185.33 = 3,194.39 : x
2. Step 2: Convert to fraction form
   8,123.91/12,185.33 = 3,194.39/x
3. Step 3: Cross multiply
   8,123.91x = 12,185.33 × 3,194.39
4. Step 4: Simplify right side
   8,123.91x = 38,924,619.40
5. Step 5: Solve for x
   x = 38,924,619.40/8,123.91
6. Step 6: Final answer
   x = 4,791.37