Finding the Fourth Proportional to 12,945.75, 19,419.71 and 3,711.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.75 : 19,419.71 = 3,711.75 : x
2. Step 2: Convert to fraction form
   12,945.75/19,419.71 = 3,711.75/x
3. Step 3: Cross multiply
   12,945.75x = 19,419.71 × 3,711.75
4. Step 4: Simplify right side
   12,945.75x = 72,081,090.03
5. Step 5: Solve for x
   x = 72,081,090.03/12,945.75
6. Step 6: Final answer
   x = 5,567.93