Finding the Fourth Proportional to 13,131.62, 19,694.42 and 3,771.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.62 : 19,694.42 = 3,771.57 : x
2. Step 2: Convert to fraction form
   13,131.62/19,694.42 = 3,771.57/x
3. Step 3: Cross multiply
   13,131.62x = 19,694.42 × 3,771.57
4. Step 4: Simplify right side
   13,131.62x = 74,278,864.78
5. Step 5: Solve for x
   x = 74,278,864.78/13,131.62
6. Step 6: Final answer
   x = 5,656.49