Finding the Fourth Proportional to 13,131.78, 19,694.66 and 3,771.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.78 : 19,694.66 = 3,771.72 : x
2. Step 2: Convert to fraction form
   13,131.78/19,694.66 = 3,771.72/x
3. Step 3: Cross multiply
   13,131.78x = 19,694.66 × 3,771.72
4. Step 4: Simplify right side
   13,131.78x = 74,282,733.59
5. Step 5: Solve for x
   x = 74,282,733.59/13,131.78
6. Step 6: Final answer
   x = 5,656.72