Finding the Fourth Proportional to 12,713.39, 19,071.32 and 3,945.95

Step by Step Solution

1. Step 1: Write the proportion equation
   12,713.39 : 19,071.32 = 3,945.95 : x
2. Step 2: Convert to fraction form
   12,713.39/19,071.32 = 3,945.95/x
3. Step 3: Cross multiply
   12,713.39x = 19,071.32 × 3,945.95
4. Step 4: Simplify right side
   12,713.39x = 75,254,431.59
5. Step 5: Solve for x
   x = 75,254,431.59/12,713.39
6. Step 6: Final answer
   x = 5,919.31