Finding the Fourth Proportional to 13,323.89, 18,386.33 and 7,355.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,323.89 : 18,386.33 = 7,355.21 : x
2. Step 2: Convert to fraction form
   13,323.89/18,386.33 = 7,355.21/x
3. Step 3: Cross multiply
   13,323.89x = 18,386.33 × 7,355.21
4. Step 4: Simplify right side
   13,323.89x = 135,235,189.57
5. Step 5: Solve for x
   x = 135,235,189.57/13,323.89
6. Step 6: Final answer
   x = 10,149.83