Finding the Fourth Proportional to 12,713.27, 19,070.08 and 3,947.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,713.27 : 19,070.08 = 3,947.63 : x
2. Step 2: Convert to fraction form
   12,713.27/19,070.08 = 3,947.63/x
3. Step 3: Cross multiply
   12,713.27x = 19,070.08 × 3,947.63
4. Step 4: Simplify right side
   12,713.27x = 75,281,514.69
5. Step 5: Solve for x
   x = 75,281,514.69/12,713.27
6. Step 6: Final answer
   x = 5,921.49