Finding the Fourth Proportional to 12,722.72, 19,085.90 and 3,958.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.72 : 19,085.90 = 3,958.31 : x
2. Step 2: Convert to fraction form
   12,722.72/19,085.90 = 3,958.31/x
3. Step 3: Cross multiply
   12,722.72x = 19,085.90 × 3,958.31
4. Step 4: Simplify right side
   12,722.72x = 75,547,936.75
5. Step 5: Solve for x
   x = 75,547,936.75/12,722.72
6. Step 6: Final answer
   x = 5,938.04