Finding the Fourth Proportional to 13,131.15, 19,693.72 and 3,771.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.15 : 19,693.72 = 3,771.09 : x
2. Step 2: Convert to fraction form
   13,131.15/19,693.72 = 3,771.09/x
3. Step 3: Cross multiply
   13,131.15x = 19,693.72 × 3,771.09
4. Step 4: Simplify right side
   13,131.15x = 74,266,869.12
5. Step 5: Solve for x
   x = 74,266,869.12/13,131.15
6. Step 6: Final answer
   x = 5,655.78