Finding the Fourth Proportional to 9,139.50, 13,711.68 and 3,944.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.50 : 13,711.68 = 3,944.16 : x
2. Step 2: Convert to fraction form
   9,139.50/13,711.68 = 3,944.16/x
3. Step 3: Cross multiply
   9,139.50x = 13,711.68 × 3,944.16
4. Step 4: Simplify right side
   9,139.50x = 54,081,059.79
5. Step 5: Solve for x
   x = 54,081,059.79/9,139.50
6. Step 6: Final answer
   x = 5,917.29