Finding the Fourth Proportional to 9,145.89, 13,720.52 and 3,599.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.89 : 13,720.52 = 3,599.12 : x
2. Step 2: Convert to fraction form
   9,145.89/13,720.52 = 3,599.12/x
3. Step 3: Cross multiply
   9,145.89x = 13,720.52 × 3,599.12
4. Step 4: Simplify right side
   9,145.89x = 49,381,711.34
5. Step 5: Solve for x
   x = 49,381,711.34/9,145.89
6. Step 6: Final answer
   x = 5,399.33