Finding the Fourth Proportional to 9,142.74, 13,709.52 and 3,591.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.74 : 13,709.52 = 3,591.81 : x
2. Step 2: Convert to fraction form
   9,142.74/13,709.52 = 3,591.81/x
3. Step 3: Cross multiply
   9,142.74x = 13,709.52 × 3,591.81
4. Step 4: Simplify right side
   9,142.74x = 49,241,991.03
5. Step 5: Solve for x
   x = 49,241,991.03/9,142.74
6. Step 6: Final answer
   x = 5,385.91