Finding the Fourth Proportional to 13,784.85, 20,674.15 and 3,923.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,784.85 : 20,674.15 = 3,923.91 : x
2. Step 2: Convert to fraction form
   13,784.85/20,674.15 = 3,923.91/x
3. Step 3: Cross multiply
   13,784.85x = 20,674.15 × 3,923.91
4. Step 4: Simplify right side
   13,784.85x = 81,123,503.93
5. Step 5: Solve for x
   x = 81,123,503.93/13,784.85
6. Step 6: Final answer
   x = 5,884.98